Yikes!
Isn't one of you options to rebuild an existing trailer? I have this idea sitting around [since 2013, apparently]
The Template is discredited in some circles, but if you don't tell people they'd never know.
I'd do a trailing arm kneeling suspension, and a winch to stow and unload it (tail first) so you don't have to egress inside the trailer.
The Roadster isn't my favorite either, but it's a big market opportunity. The Cameo two-passenger is pretty close to a Trailer Tow Vehicle.