Thats great bulldozer you sound motivated. So you are going to ride from your chair too. When I was looking to ride again I first looked into trikes I could wheel on and ride from the chair. Found a couple guys who make them, one in Florida think the other was on Arizona but thats too far away so looked at sidecars. Found a number of small companies who make then, 1 in WA named Dauntless who helped me figure out mine, another in Canada and Tomco which is defunct in Pennslvania and a few other small companies. If I had to do it again I would keep my ear to the ground looking for a drive from Sidecar on Eba yor Craigslist while also looking around my home town for a fabrictor who could build the sidecar themselves. They are pretty simple.
Good luck and be sure ar tell us how you are doing. :)