My Brother-In-Law built such a garage, 3 bays with a lift in the first bay. It was bought at auction locally. Watch for service stations to close and go to auction liquidation. I know his lifts big enough to put a full size van on it and lift it into the air high enough not to crouch under for access. Yet it still doesn't hit the ceiling. Of course he expects to be a self-employed mechanic and is in the market for a wheel lift wrecker yet.
Brian