Jim:
InyoKern’s comments [about living in trailers] are right on. My brother is [living] in a 21.5 foot long toy hauler and it is built stronger than a conventional trailer and you can haul a lot in it. It is very comfortable and has extra large storage capacity for fuel, water etc. He has 200 watts of photovoltaic panels on the roof and four 6 -volt golf cart batteries cabled together to provide most of his electrical needs.
I have a 9 foot truck camper and though its good the trailer is much more versatile for moving about from city to city if you have a place to drop it, like a RV park. They are a good choice for a small business, as well. – Jason M.