This may not be much help, but get in touch with The Chain Gang (www.f650.com). There's a guy in their ranks who knows a guy in San Antonio I think who makes a small trailer that can be disassembled and stored in tight places yet is sturdy enough to haul an RT. It's basically just a long tongue that crosses the axle and has a track for the wheels to sit in, a small hinged section of track that serves as a ramp then folds up, and a few tie-down points and a pair of wheels. Light enough that you don't need a huge truck too.
The guy who makes them is a high school shop teacher and all proceeds from trailer sales benefit the school.