search the Internet for several various ways to search craigslist nationwide. I think allcraigs.com is one. These things pop up.
Mine had corner jacks mounted. Bad idea! The structure is not built or designed to take the mounting lag bolts (one side of each corner is simply a 1x2). If you don't have corner jacks on one, DON'T INSTALL THEM.
These 8' or 8.5' guys are pretty light. After removing most of my extras, and the jacks, it came in about 1600 lbs. As I continue my resto-mod I'll be checking the weight.
One portable side jack each side it a pretty good method for these smaller units. I plan to build a steel angle iron surface unit for my side jacks to fasten to. These units will have male pipe on the ends to insert in the female pipes of the original under wing mount jack system frame.
I too have lots of wood replacement issues and have the metal skin about half ready to remove completely. Once off and temp stored I'll do my wood replacement, re-wire, stryro-board insulation in cavities, thin batt (.5" like original) on outer side of framework, and re-install the metal.
Also, after painting a rubber membrane seal over a house shower concrete board and under the ceramic tile, I am considering it's use on my camper. It is thin, dries into a single waterproof sheet (pretty hard rubber sheet). I'd install styro-board insulation in the 3/4" framing cavity, mesh fiberglass tape all exterior seams, paint on the membrane (roll or brush) then re-install the metal exterior - all over the newly replaced various wood framing parts. I also would overlap the membrane on the window and door cutout edges.