Last Updated: July 2026
By AZ Tiny Life Editorial Team | Reviewed: July 2026
Every comparison article on this topic picks two options and argues one is better. Tiny home vs. RV. ADU vs. park model. None of them compare all four at once, and almost none address the two questions that actually determine which one is right for you: how does each option get financed, and what happens to its value over time?
This guide covers four distinct housing types — THOW (tiny home on wheels), Class A/B/C RV, ADU (accessory dwelling unit), and park model RV — across twelve dimensions. The goal is to give you enough specificity to make a real decision rather than a general sense of the differences.
One thing upfront: these are not interchangeable terms. Lenders treat them as completely different collateral. Local governments classify them under entirely different legal frameworks. Insurance companies underwrite them differently. Treating them as variations of the same thing is how buyers end up in the wrong financing product — or the wrong county.
What Each One Actually Is (Legal Definitions First)
THOW — Tiny Home on Wheels
A THOW is a custom-built home on a trailer chassis, typically 150–400 sq ft. Despite being called a “home,” nearly every state classifies it legally as a recreational vehicle — DMV-registered, governed by RV park rules, and generally prohibited as a primary residence in residential zones. To qualify for RV financing, a THOW must carry RVIA or NOAH certification (a physical plate attached to the home). Without certification, lenders treat it as personal property and require a personal loan.
RV — Recreational Vehicle (Class A, B, or C)
A factory-built vehicle designed for travel and short-term habitation.
- Class A: Bus-style body, 26–45 ft, self-propelled. $80K–$600K+. Most common among full-time RVers.
- Class B: Van conversion. $80K–$200K. Best for solo or couple travel.
- Class C: Cab-over van chassis, 20–33 ft. $60K–$200K. Mid-range comfort and price.
All three are titled as motor vehicles (Class A/C) or towable vehicles (5th wheels, trailers). The RV financing market is the most developed of any option on this list — banks and credit unions have been writing these loans for decades.
ADU — Accessory Dwelling Unit
A secondary living unit on a lot that already has a primary residence. Built on a permanent foundation. Governed by residential building codes and local zoning ordinances — not RV rules. Not portable. Legally and economically functions as real property. This is the only option on this list that qualifies for traditional real estate financing (HELOC, construction loan, some ADU-specific programs) and typically appreciates in value.
Park Model RV
A factory-built structure on a chassis, designed to stay in one location. Maximum 400 sq ft under the ANSI A119.5 / RVIA Park Model Recreational Vehicle standard. Unlike a THOW, a park model is built for semi-permanent placement in RV parks or manufactured home communities — not for regular road travel. It’s cheaper to buy than any other option on this list but almost always requires renting the lot beneath it ($350–$700/month).
12-Dimension Comparison Table
| Dimension | THOW | Class A/B/C RV | ADU (foundation) | Park Model RV |
|---|---|---|---|---|
| Typical purchase price | $60K–$150K | $60K–$600K+ | $80K–$300K | $35K–$100K |
| Monthly financing (typical) | $820–$1,370 | $700–$3,500 | $567–$992 | $380–$530 |
| Annual insurance | $800–$2,000 | $1,200–$4,000 | $600–$1,800 | $500–$1,400 |
| Title / registration | DMV (RV title) | DMV (vehicle title) | Real property deed | DMV (RV title) |
| Where you can legally place it | Rural land, RV parks; cities: very restricted | Campgrounds, RV parks; rarely permitted as primary residence | On lot with existing primary home | RV parks, manufactured home communities |
| Mobility | Full (requires tow vehicle — F-250 minimum) | Self-propelled (Class A/C) or tow (5th wheel) | None | Semi-permanent (1–2 moves/year max) |
| Utility setup | Self-contained or pad hookup | Self-contained or full hookup | Tied to main home or separate meter | Full hookup at community pad |
| Resale value at year 5 | ~50% of purchase price | ~40–50% of purchase price | Appreciates with land (~+15–25%) | ~60–70% of purchase price |
| Depreciation curve | 15–25% yr 1; ~50% by yr 5 | 20–30% yr 1; 50–60% by yr 5 | Appreciates | 10–15% yr 1; 30–40% by yr 5 |
| Financing availability | Moderate (RVIA cert → RV loan; no cert → personal loan) | Easy (mature RV loan market) | Good (HELOC, construction, ADU programs) | Moderate (chattel, personal, MH loans) |
| Customization | Very high — built to spec | Low — factory floor plans | Very high — built to spec | Low–medium — factory options |
| Long-term primary residence | Legally possible in limited jurisdictions | Very limited (recreational classification) | Best option — purpose-built as a dwelling | Limited by RV park rules and community policies |
Financing: What Each Option Actually Costs Per Month
Financing terms differ by far more than the rate. Loan length, down payment requirements, collateral classification, and lender availability all affect total cost in ways the monthly payment alone doesn’t show.
THOW Financing
- RVIA/NOAH certified: Qualifies for RV loans — 7.49–12.99%, 10–15 year terms. Requires a physical certification plate on the home. Lenders: LightStream, credit unions with RV programs, 21st Mortgage for chattel-style THOW products.
- Non-certified THOW: Personal loan only — 8.99–24.99%, 5–7 year terms, no collateral required. Significantly higher monthly payment for the same loan amount.
RV Financing
The most mature secondary market of any option on this list. Standard RV loans run 6.49–12.99%, 10–20 year terms, with 10–20% down payment for Class A. Multiple lenders compete for this business — banks, credit unions, specialty RV lenders. No special certification requirements beyond manufacturer compliance.
ADU Financing
- HELOC: Most common path for homeowners with existing equity. Variable rate, currently 7.5–9.5% (prime + margin). Interest-only during draw period, then principal + interest during repayment.
- Construction loan → permanent financing: Higher complexity, fixed rate. Best for buyers without existing equity.
- State ADU programs: California SMIFL, Oregon Housing and Community Services ADU loans, Washington State Housing Finance Commission. Check your state housing agency for eligibility and rates.
Park Model Financing
- Chattel mortgage: Secured by the home (not land). Most park model buyers don’t own the land. Typical terms: 10.5–14%, 15–20 years. Specialty lenders: 21st Mortgage, Vanderbilt Mortgage, Triad Financial Services.
- Personal loan: For lower-cost park models ($35K–$50K), an unsecured personal loan on a 5–7 year term often produces a lower total interest cost than a 20-year chattel, despite the higher rate.
Monthly Payment Comparison
Same scenario: $80K home (or closest equivalent), standard 2026 rates:
| Financing product | Home cost | Down | Financed | Rate | Term | Monthly payment | Total interest |
|---|---|---|---|---|---|---|---|
| Personal loan — non-certified THOW | $80K | $0 | $80K | 10.99% | 7 yr | $1,370 | $35,080 |
| RV loan — RVIA-certified THOW | $80K | $8K | $72K | 8.99% | 12 yr | $820 | $45,940 |
| HELOC repayment phase — ADU | $80K | n/a | $80K | 8.5% | 10 yr | $992 | $39,040 |
| Chattel mortgage — park model | $45K | $3K | $42K | 11.5% | 15 yr | $491 | $46,380 |
The personal loan produces the highest monthly payment and the lowest total interest — because the term is short. The RV loan produces a manageable monthly payment but the longest total interest bill. The park model chattel produces the lowest absolute payment, but note the lower purchase price ($45K, not $80K).
For the full lender comparison — rates, minimum credit scores, and which products fit which situation — see our Tiny Home Financing Guide.
Legal Status by State: The One-Paragraph Summary
A THOW is classified as an RV in virtually every state. An RV is classified as a recreational vehicle. An ADU is classified as a secondary dwelling. A park model is classified as an RV. The legal consequence: THOWs, RVs, and park models cannot legally be used as primary residences in most residential zones — regardless of how nice they are or how long you plan to live in one.
Exceptions where THOW-as-primary-residence is explicitly permitted: Oregon (HB 2737 — statewide on rural residential land), Brevard County FL (Code §62-1844), rural Tennessee (many counties), rural Texas (unincorporated land — no county zoning authority). ADUs have the fewest placement restrictions because they’re built as dwellings on permitted residential lots.
The full 50-state breakdown — including THOW rules, ADU legislation, and what happens if you violate zoning — is in Tiny Home Zoning Laws by State 2026.
Depreciation Reality: Where Value Goes Over Time
This is the section most buyers skip — and the one that determines whether their housing decision builds or destroys long-term wealth.
| Housing type | Year 1 depreciation | By year 5 | By year 10 | Pattern |
|---|---|---|---|---|
| THOW | 15–25% | ~50% of purchase price remaining | ~35–40% remaining | Follows RV market (NADA RV valuations) |
| Class A RV | 20–30% | ~40–50% remaining | ~25–35% remaining | Fastest depreciation of any option |
| ADU on owned land | Typically appreciates | Market + land appreciation | Market + land appreciation | Comparable to residential real estate |
| Park model RV | 10–15% | ~60–70% remaining | ~50% remaining | Slowest depreciation among mobile options |
The ADU gap is the most important number in this table. A $150,000 ADU (build cost) on a property in a market appreciating at 4%/year is worth approximately $175,000–$185,000 at year 5. A $150,000 THOW at year 5 is worth roughly $75,000. That $100,000 difference is real wealth creation — or destruction — depending on the choice.
Why park models depreciate slower than THOWs: Park models are factory-built and semi-permanent, meaning they accumulate fewer transport-related miles and stresses. A THOW that has been moved several times depreciates faster than one that has sat on the same pad. Park models rarely move at all.
Why Class A RVs depreciate fastest: High purchase prices combined with engine, drivetrain, and appliance maintenance costs that become expensive as the vehicle ages. The market for used Class A RVs is liquid but price-sensitive — buyers can see NADA values easily and negotiate accordingly.
Decision Guide: Which Option Fits Your Situation
“I want to travel full-time and work remotely.” → Class B or Class A RV
Full-time travel requires a vehicle, not a structure. A Class B (van conversion) is optimal for solo or couple travel — park anywhere, no tow vehicle needed, easiest to maneuver. Class A is better for extended stays and more living space. A THOW is not a practical travel vehicle: it requires an F-250 or heavier tow truck, costs $400–$800 per major relocation (fuel, permits, professional towing), and takes days to set up at each stop.
“I want a permanent home that appreciates and builds equity.” → ADU
An ADU on owned land is the only option on this list that functions as real property. It appreciates, builds equity, qualifies for homestead exemptions, and can be refinanced as part of the primary property. The trade-off: you must already own — or purchase — a property with an existing primary structure. This makes it the most expensive entry point of any option.
“I want flexibility to relocate once every few years but want a quality, custom-built space.” → THOW
THOWs are built like houses, not RVs. You get real insulation, quality materials, a custom layout, and a space that functions as a real home. The trade-off: you’ll likely move it rarely (legally and practically), it depreciates, and placement is restricted in most residential zones. For buyers who want a high-quality small home with the option of mobility — not frequent mobility — this is the correct choice.
“I want the lowest monthly out-of-pocket housing cost in a fixed location.” → Park Model
Park models have the lowest purchase price of any option and the most established financing infrastructure for semi-permanent community placement. Total monthly cost — lot rent ($350–$700) plus financing ($400–$530) — typically runs $750–$1,230/month. That is below the median apartment rent in every major US metro and below the carrying cost of any other option on this list.
“I already own a home and want to add income or house a family member.” → ADU
An ADU added to existing property creates a rentable unit (generating $800–$2,000/month in most markets) or provides housing for a parent or adult child without subdividing the lot. It adds assessed value to the property and can be financed through existing home equity. No other option on this list produces rental income or adds to the value of another asset you already own.
What Competitors Compare That You Won’t Find Here
| What most comparison articles say | What’s actually true |
|---|---|
| “Tiny homes and RVs are similar” | THOWs are built to house standard, RVs are built to vehicle standard — insulation, structural materials, and lifespan are fundamentally different |
| “ADUs are expensive” | ADUs are expensive to build but the only option that generates positive net worth over time |
| “Park models are a type of manufactured home” | Park models are classified as RVs, not manufactured homes — different financing, different legal status, different HUD applicability |
| “You can live full-time in any of these” | Legally, only ADUs are purpose-designed for full-time primary residence; all others face legal barriers in most residential zones |
Frequently Asked Questions
Can I get an RV loan for a tiny home on wheels?
Only if the THOW has RVIA or NOAH certification — look for the physical certification plate attached to the home. Without certification, lenders classify it as personal property and require a personal loan (higher rate, shorter term). Some credit unions make exceptions on a case-by-case basis, but this is lender-specific and not standard.
What’s the difference between a park model and a tiny home?
Construction standard, placement intent, and legal classification. A THOW is custom-built to house-like standards (real insulation, plumbing, cabinetry) and designed to be moved when needed. A park model is factory-built under the ANSI A119.5/RVIA standard, designed to stay in one community pad permanently, and is more similar to manufactured housing than to a custom tiny home. Park models also cost less — typically $35K–$100K versus $60K–$150K for a quality THOW.
Does an ADU count as a tiny home?
Legally, they’re different categories. An ADU is a permitted secondary dwelling on an existing residential lot, built on a permanent foundation. What most people mean by “tiny home” is either a THOW (on wheels) or a small foundation home under 400 sq ft. An ADU can be small, but the legal category relates to its placement relationship to the primary dwelling — not its size. A 200-square-foot ADU is still a permanent dwelling, not an RV.
Which option is best for full-time living as a primary residence?
An ADU is the most legally secure option — it’s a permitted dwelling, recognized as a primary residence by lenders and local governments, and qualifies for homestead property tax exemptions. For buyers without an existing property to build an ADU on, a foundation tiny home (not a THOW) in a permissive county is the next-best option. THOWs, RVs, and park models all face significant legal barriers to primary residence status in most jurisdictions.
Can I finance a park model with a regular mortgage?
No. Park models are titled as personal property (not real estate), so conventional mortgages don’t apply. Financing is through chattel loans, personal loans, or in some cases manufactured home loans — if the park model is permanently affixed and the land is also owned. Most park model buyers rent the lot, making chattel mortgage the default financing path.
What happens to my THOW or RV if the park closes or raises lot rents?
You move it — but that’s both the advantage and the cost. THOW relocation by a professional mover typically runs $500–$2,000 per move (fuel, permits, hookup fees). Finding a new RV park with availability, year-round residency permission, and utilities runs $400–$900/month in lot rent. This is the hidden ongoing risk of the mobile option: you have flexibility to leave, but exercising that flexibility costs real money.
Browse Listings by Housing Type and State
If you’ve decided a tiny home is your path — foundation or THOW — browse available homes in the most buyer-friendly states:
- New Mexico tiny homes — Best overall: low land cost, low property tax, rural permissiveness
- Arizona tiny homes — Lowest property tax, ADU-by-right in Phoenix metro
- Tennessee tiny homes — Best community availability, permissive rural counties
- Texas tiny homes — Best rural THOW placement; no county zoning on unincorporated land
- Florida tiny homes — ADU reform underway; warm climate; active coastal communities
- Browse all tiny home builders — national and regional builders organized by state
Related guides:
- How to Finance a Tiny Home in 2026 — Lender comparison, monthly payment examples, bad credit paths
- Tiny Home Cost Breakdown 2026 — What a tiny home actually costs beyond the sticker price
- Tiny Home Zoning Laws by State 2026 — 50-state legal framework table
Information reflects publicly available data and standard lending market conditions as of July 2026. Loan rates are representative ranges and will vary by lender, credit score, and loan amount. Verify current rates directly with lenders before making financing decisions.