You could go to a store that sells handicap vans and see what their prices are. Or you could ask other people that you know that are experienced with handicap vans that may lead you in the right direction.
I would suggest going with a dealer that works with this type of van. If you visit www.betterlifemobility.com you will find new and used vans.
You can get used handicap vans or wheelchair vans in Nashville at the Nashville centers of the following stores/ websites:http://www.mobilityvansales.com/used-handicap-vans/vansales-in-nashville-tennessee.html; http://www.usedhandicapvans.net/; http://www.aavans.com/Vehicles/UsedWheelchairVans.aspx;
There are several used car dealerships that have may sell used handicap vans. Used vans can also be converted into a handicap van. You may be able to find used handicap vans at car dealers in the area, as well as on CraigsList. A great website to find them in the Memphis area is http://www.mobilityvansales.com/used-handicap-vans/tennessee_vansales.html.
There are several companies online that sell handicap vans and deliver them nationwide. Two such companies are Mobility Vans USA at http://www.mobilityvansusa.com, and Ams Vans at http://www.amsvans.com.
One can find handicap accessible vans locally in your telephone company's Yellow Pages or on the YP's website.You could also try Ride-Away on the web.
I don't think van are required to have handicap features, I think you have to have them added on...sort of like extras. Cars and vans are the same so there is no law that says that all vans must have handicap features.
There are a lot of resources to acquire handicap vans. Local charity organizations may have them, or you could even check your local classified ads.
You can find them at aavans (http://www.aavans.com/Louisiana/WheelchairVanDelivery.aspx), Mobility Van Sales (http://www.mobilityvansales.com/used-handicap-vans/louisiana_vansales.html), and Acces Vans Of Louisiana (http://www.accessvans.org/).
These are given to them by the state. They provide proof of handicap, and then they are issued a plaque if they desire one.
grants for handcap vans
If you haven't found anything in the area, you may want to check online. I saw at accessiblevans.com handicap vans in the Gun Barrel City area.
Vans with the ability to support a handicapped person can be purchased from handicap stores, where one can either buy or rent a van to his specifications.