You are severly limiting the selection of trikes by deciding in advance that you want a folder. Probably better than 90% of the used trikes on the market do not fold. Folders are a fairly recent advance in triking. Try the regular ones and you might just like what you ride. I have carried my non-folding GS GTO and an older WW 3.4 inside of vehicles, on the roof, and even on a regular rack that hangs off the back of my vehicle. While you can save some $, decent used trikes are still pretty expensive. Check out www.bentrideronline.com for a fairly large number of trike reviews. It might help you make a decision.