My DH is tall. He has a Permobil F3, which is a big chair. We have a Dodge Grand Caravan with a Braun XT side entry conversion. It was the only minivan that he fit comfortably in with his chair.
We have a 2 car garage and the van fits in one (left) side. On the other side, we had a ramp put up against the far (right) wall. We can deploy the van's ramp and he can get in the van in the garage. It is a tight fit, but it works. I sometimes have to squeeze in the driver's side door, but that's a minor inconvenience.
The ramp from our garage goes in to our laundry room, which is pretty small. He can get in the door, and with a sharp turn, get in to the house even with a full size washer and dryer.
Measure, measure, measure. Don't get any vehicle until your husband gets his chair. We ended up going through Mobility Works to get the van. The salesman brought several different models of vans right to our house so DH could try them out and we could make sure everything worked.
Good Luck!