We have two steel frames from a former double wide home. We have stripped them down to just the sub floor and steel frame. One has been stripped down completely now. There is plenty of good lumber left that can probably be salvaged
The steel frames can take multiple axles in order to haul. We currently have one set of wheels and axles we would include. You would also need to bolt on a hitch. They could also be lifted on to a big flatbed potentially.
This is a great economical start to build your own tiny home/ Tiny house. These each measure about 12 feet x 40 feet. So you could build two Tiny Homes or one larger home on them. Or convert to a big trailer to haul etc.