A lot ill depend also on his weight. The smallest ones have a capacity of 200-250 pounds.
I am close to 300 and looking at the possibility of the Pride Legend. I really like it, as one of the reasons, because of the headlights built in. However, it complicates things as it is heavier than my current ECV and will be more difficult to put in the car's trunk. If I get it, I will also need to buy a lift. That in itself is not too bad, but my current car has 145000 miles on it and needs new struts, especially if I get a lift. Since I usually drive only myself and at most one or two other people I do not want any sort of van or truck, so to get a new ECV I will have to first buy a new car.