how much insulation in ceiling? walls? perhaps floor?
was subfloor checked/replaced?
was housewire used? [very bad fire danger] or auto wire? [great]
look under and inside things, solid quality? pro? tacky?
runs well? stops well? shifts well? everything works?
average 20 yr old school bus from a dealer = $3k
basic camper upgrade = another $3k + 200hr labor
full time residence upgrade = another $4k + 600hr labor
BUYER BEWARE