Does he need a scooter all the time? My DH uses a scooter at disney but uses a rollator at home. He can walk a short distance under 30 ft with a cane. But just to throw this out there, would a rollator be of any use. Use that the week you are off site for from the hotel to car to park and hope you can get an
ECV. I have heard but never tried myself, that disney will hold on to walkers during the day while you rent the EVC.
And if you can't get an EVC, at least you'll have something.