I had a pretty snappy response for the OP but I'll take a higher road.
Your Explorer will be able to tow only a smaller sized TT, at best.
Trying to restore a $900 MH is not a weekend project, more like a year.
Your budget is way too low to have something comfortable and roadworthy.
FWIW, I've looked at MH's sold on the salvage market. Some of them looked repairable. Upon further investigation, they would all take considerable work and expense to make roadworthy. With your preliminary budget, I would abandon the idea. BTW, a replacement tire is in the neighborhood of $300.