[PatricioIN]

I don't know how much a Windstar weighs, but it wouldn't be very aerodynamic, not a big deal at low speeds, but once you get on the highway it will really eat up the amps. Are you saying you want to be able to charge it in 20 minutes? Not going to happen. Several hours at least even at high voltage. Someday (and already in some countries) there are quick chargers, but don't count on that now,and I think they'd only work with lithium type batteries anyway.

The range shouldn't be a problem even with lead acid batteries, which is probably all you can afford with your budget. If you scrounged around for less expensive components, you might (with the extra 4k) be able to afford a small lithium pack which could provide you more range. Again, this is somewhat dependent on the weight of the vehicle to start out. Adding four, 200lb, people isn't going to make things easier.

I'm not trying to discourage you, but set realistic goals and you'll be much happier with the outcome.

 

[PatricioIN]

you can do any vehicle, the more they weigh, the less aerodynamic just means they'll get a lower range than a smaller car.

look through the evalbum.com for stats on larger vehicles