Agreed. There are so many things that can go wrong when you combine a vehicle and a house.
Just think of the smorgasboard of madness in your typical RV. By this I mean everything from a truck camper to a diesel pusher, and the thought of a home built RV based on what Guido taught you on Youtube ups the ante.
- Fiberglass/wood shell mated to vehicle chassis/trailer frame by someone VERY far from an automotive engineer, though I'm sure they would argue
- Automotive AND residential wiring also not designed or installed by an actual automotive engineer, rattling down the road, or worse yet trail
- Multiple fuel sources and tanks. Gasoline, diesel, propane, improperly vented off gassing FLA batteries
- Open flame cooking devices
- Often uninsulated heater ducting
- Incandescent light bulbs everywhere (until recently)
- All of this in a box made of kindling, light fabrics, foam and fiberglass.
What could go wrong?
Yes, I buy, sell, build and use all kinds of campers but I put a CO/propane detector in them pretty quickly when I get them.