Has anyone ever built a homemade toy hauler using a old popup camper and attached it to a larger flat bed trailer? if so what needs to be considered and what are the cost? I have seen older popup for $1000 and flatbed trailers for $2000. I figure for $3500 I could have a nice set up. That is a lot cheaper than buying the fleetwood model for 10K!. But I would like to hear if anyone has tried this and any advise.