I have a feeling this is OT; Does anyone know if there's a thread where people ask/answer these questions?
I'll be happy to help out; let's use the second link from the EVDL.
You probably have a number of candidate cars. Run the numbers for each car and compare the results. It'll help you choose a car.
Feel free to PM me; I'll attempt to answer any questions w/ some decent background in their importance.
Glad to see you're going fossil fuel free!