The hitches I've sent out so far only cost about $30 by USPS freight - takes about a week.
Sue, I think Welder Guy may have a couple of hitches ready (haven't talked to him in a couple of weeks). I'm sure that based on your need that the others on the waiting list wouldn't mind if I got you set up first.
How much does the chair weigh? It looks like you'll probably be carrying about 200lbs. Your current hitch could probably handle that but not much more & that depends a lot on how rough the roads are in your area. I know that you have a long gravel driveway but I'm talking teeth chattering potholes here.
You still have my cell #. Gimme a call if you want to discuss.
BTW, that folding adapter should be as strong as any that are already built into the tray.