I would also vote for the addition. First, however, I agree with the others about seeing if you can re-engineer your current situation to make it accessible from the house and address the stairs. We have a raised ranch - living space all on one floor, but it looks like a bi level. The garage is under the house, so to get stuff out of the car and into the house, I have a dumb waiter and I love it! Mine is the manual version, uses a rope pulley, but they do make electric types.