Its quite heavy to lift the door up to horizontal,even tho' its thin aly.I then put 2 diagonal props from the outer corners to the bottom of the garage door posts.
Dont think I would be able to work on a van in there tho' as too narrow!Security isnt really a prob as the whole area is locked with heavy steel gates at night anyway.
I'm considering getting one ,but slowly running out of enthusiasm ,as I cant be a**sed to do lots of work on one ,even tho' Im able to overcome most probs.and the prices seem stupidly high to me ,for a road worthy one .Im not looking for one to use as a camper,as Id probably re-configure the interior any way.Got so much hoarded stuff around (so know the feeling Panky!!)Need to sell some of it to release a few quid. I dont 'do' e- bay tho'!The bigger the sheds you have the more room for cr*p!