[skyking]

10 miles? I think he'd like to go down the beach with his grandkids.
I want to put as fat a tire on there as I can for flotation, and probably go with 4 wheels for stability.
The design in mind is a pair of channels that he rolls his conventional chair up onto, that then lift up for ground clearance. Transfers are the enemy.
Now I transfer him into a 4wd rig and then back into his chair and each time we risk an injury that might lay him up for months. Like 6 months.
This only happens once a year or so, but he lives out in farm country and he'd use it quite often if I made it.
I would prefer only differential steering but that is all on the controller we can cobble up, and how to calibrate it for fine control. An e-bike typically has so much speed to it that the controller is not good for the fine stuff. An electric wheelchair controller is, but at high speed it might get dicey