"To be honest, I wouldn't have come up with anything at all if I hadn't just spent the past several weeks working with some people on redoing my own vehicle's suspension system. It's almost exactly the same rig that we use to hold up Ecto-1, but miniaturized and distributed over more shock absorbers so as to fit in with the multiple wheels. And no, no workshop that I know of, but it shouldn't be too hard to put up a tent or something in the back and seal that down against environmental influences. Normally I do my work in my room upstairs, but you can't get there yet, so..."