Trying to find the right Motorhome on a budget

Maybe try this repo/auction site. They also have cargo trailers.

Cranky Ape RVs

I agree that with that budget, you may be better served with a truck and travel trailer. How important is the car or motorcycle? Could you give one up and keep the other as your sole secondary vehicle?

The money from the sale of one could go a long way towards fuel or repairs or upgrading your rig.