If I ever had my "dream" garage, it would be a 30' x 60' minimum, 20' high ceiling, heated flooring with infrared heating above, with a perimeter type mezzanine around the upper portion for office, parts storage, etc. This would facilitate several hoists in the middle portion, and still have lots of usable extra space. Outside would have a deck around one side for barbecuing, entertaining and relaxing. A separate smaller but attached building would be beside for paint, powdercoat and sandblasting. I have had it planned in my head many years back, now I just need that lottery ticket to pay out.