Where the money goes
A build breaks into three buckets: the vehicle, the systems (electrical, water, heating), and the interior (insulation, walls, furniture, appliances). The vehicle is usually the single largest line, and electrical is usually the largest of the build systems. Everything else is smaller but adds up quickly.
Two items dominate most budgets: the vehicle and the electrical system. Get realistic numbers on those two first, and the rest of the plan comes into focus.
Realistic ranges
Beyond the vehicle, build costs vary widely with how far you take it:
- Basic weekend build: roughly $8k–20k of build on top of the vehicle.
- Comfortable DIY build: roughly $20k–50k.
- High-end DIY / semi-pro: roughly $50k–100k.
- Professional build: $100k+ on top of the vehicle.
Our budget calculator turns a build style, vehicle cost, and the systems you want into an all-in range, and the Build Planner produces an itemized estimate.
The biggest line items
- The vehicle. New vs used, mileage, roof and length, drivetrain (AWD/4x4 costs more).
- Electrical. Batteries, solar, inverter, and charging can easily be the biggest build expense, especially with a large lithium bank and air conditioning.
- Insulation and interior. Materials plus a lot of plywood, hardware, and finish.
- Water and heating. Tanks, pump, plumbing, and a diesel heater.
- Windows, fan, and a wet bath if you add them.
Where to save vs splurge
- Splurge on electrical. Quality batteries, a good charger/inverter, and correct wiring are safety and longevity; cheap electrical is a false economy that can literally burn.
- Splurge on the things you touch daily: the bed, the fan, the fridge, the faucet.
- Save on cosmetics and clever DIY furniture; reclaimed and simple materials look great and cost little.
- Save by right-sizing. Do not buy more water, battery, or kitchen than your travel needs (see weight).
The wrong place to cut is electrical safety and the systems that are buried in walls. Redoing hidden work, or worse, a failure, costs far more than doing it right once.
Hidden costs
The build materials are only part of the total. Budget for:
- Tax, title, registration, and insurance (see insurance & registration).
- Tires, suspension, and any mechanical work on a used van.
- Tools and consumables (blades, bits, adhesives, fasteners).
- Safety gear: fire extinguisher, CO and propane alarms.
- A contingency for redos and the hundred small parts.
Add a 10–15% contingency on top of your itemized budget. Almost every build spends it, on the parts you forgot and the first attempts you redo.
Phasing the build
You do not have to build it all at once. A sensible order is to make it safe and livable first (insulation, a bed, basic power and a way to cook), then add comfort (more solar, a heater, a shower) as budget allows. Phasing spreads the cost and lets you learn what you actually use before spending on what you think you need.
Common mistakes
- Forgetting the non-build costs: tax, insurance, tools, tires.
- Cutting electrical to save money.
- Over-buying capacity you will not use.
- No contingency, then blowing the budget on surprises.
- Trying to build it all at once instead of phasing.
Quick checklist
- Nail down vehicle and electrical costs first
- Pick a build tier and estimate the all-in range
- Splurge on electrical and daily-touch items
- Save on cosmetics and by right-sizing
- Budget tax, insurance, tools, tires, and safety gear
- Add a 10–15% contingency
- Consider phasing to spread the cost