What it is
The attraction is a flat floor, a full-height box and a chassis that can be serviced almost anywhere. The boilerplate steel is heavy, and the ride is stiff, loud and thirsty.
Why people choose it
Before buying a used conversion, check the floor for rust, the condition of the heater core, window and seal leaks, and whether the previous owner converted it properly. Owner-built conversions frequently miss proper venting, fume extraction and wiring certification.
What to check before you buy
Gas safety matters most. An engine bay nearby, a poorly located propane locker and no carbon monoxide alarm are the classic dangerous combinations. Have a professional check the gas and the electrics before you travel.