My wife drives, she is in a chair, and we have done three vans. The first was a Plymouth Voyager with a raised roof and lift, the second was a Plymouth Voyager with a lowered floor and ramp, and the third, which we just purchased, was a Volkswagen Eurovan which required no body modifications, but we installed a lift for her chair. There is also the option of the full-sized van, which I assume you are not interested in. Will your son eventually drive? I don't need to know the answer, but it will be something you might want to think about. Let me know if you need more information. I have a shop that I highly recommend to do the work.