my plan is to do a 36" door inside of a 6' wide section of wall that is hinged, so take out a few screws and swing the wall back and have an almost ceiling height by 6' wide opening to move anything in/out and a normal 36" door there the rest of the time.
i'm tall so i plan to put all of my heavy equipment on a permanent frame that raises the working surface and allows a pallet jack to roll under for moving. I have tried the leveling casters but I'm unhappy with the amount of squish the solid pads leave in the equipment.