[rootusrootus]

I would not use RVs as a good benchmark. They are super cheap for a reason. The biggest reason not to live in one full time is that they quickly degrade under that kind of use. They are not built for anything other than occasional use. That is on top of their steep operating expenses, even if you can keep it held together.

A better benchmark would be a manufactured home. Transported on wheels, built in a factory, but intended to be used full time indefinitely.

IIRC, stick-built homes are only like 15% more expensive than the equivalent manufactured home, and you have a lot more flexibility in the design. Probably this is most of why manufactured homes are only popular in particular niches.