What's the longest this type of vehicle can be on the outside? My GMC Savana extended is 20' 4" according to the GMC website. I remember hearing in the distant past, when I had an extended Econoline, that 20' is the longest legal length for parking on city streets.
No idea if that is true or what the law might say now (or how much it may vary state-to-state) but that would limit the amount of extending one can do. With that much engine compartment sticking out front, it further limits inside cargo space.