I think what you want is a scooter (also called ecv). Unless you already drive an electric wheelchair, none of the companies will rent one to you. I don't know the price of an ecv from the outside places (I'm sure someone who does know will post). The price from the parks is a $10.00 deposit + $30.00 rental Here is the contact info for the outside rental places:
Care Medical: http://www.caremedicalequipment.com/
Save Up to 30% on Rooms at Walt Disney World!
Save up to 30% on rooms at select Disney Resorts Collection hotels when you stay 5 consecutive nights or longer in late summer and early fall. Plus, enjoy other savings for shorter stays.This offer is valid for stays most nights from August 1 to October 11, 2025.
CLICK HERE