Man Mike that is a huge list of expectations for a drivers stand, and portable too. From your list it would seem that the best way to start out is by using a mobile trailer to build on. Maybe one of those two ton dual wheeled type haulers. That way once it is all done you can move it anywhere you want with a toe hitch. Maybe put some outriggers on it for stability no matter where you park it.
That would be funny to see Harold up on his own stand yelling at everyone
. If he acts up too much you could just leave him up there when the sun goes down
. Or if he is driving really well just lower his stand.
ha ha ha ha.