volvoman, there have been some 20' garage motorhomes built by Renegade, with a 4,000 lb. liftgate door. The problem is the living quarters gets so small- it really is not feasible. If you were thinking of more overhang, anything over 8' will start to drag on some smaller inclines. They did build a 17' garage with 17' living quarters that was pretty livable- but no bedroom.
'18 Renegade 45'
Volvo Twin Screw, 500 hp I-Shift 12 Speed
30' Renegade Stacker Trailer