I just saw this thread, and thought that I'd post a reply regarding wheelchair modified vans since I currently have one. Why are you buying the chassis first and then paying to have it modified? There are several manufacturers who do the conversion straight from the assembly line prior to selling new vans. Since a lot of these have been sold, there are a lot of used modified vehicles on the market currently. You'll pay more to have the modification done separately.

Do you have a special need that requires a lift on the van? I have a lowered floor ramp van that accommodates having a person in the wheelchair roll into it and remain seated in the chair while moving.

They just recently started modifying Odysseys and Siennas. You probably won't find a good deal on a used one of these. However, there's ample supply of Caravans and also Ford and GM minivans.

If you want to know more, I can try to answer your questions.

Joe

2008 BMW 535i
2006 Toyota Sienna Limited Rampvan