On my 4100, with the patio railing and 3 season screen enclosure, my 12' garage is 11' 0" clear. I was concerned about the height of my Mule, but it was the length that almost blew the deal. The Mule is 10' 10". Personally, I would rather have the roll up screen door than the 3 season doors, since I don't have an AC in the garage, and about 75% of my camping is in hot weather. That would give you about another 6" of clearance.