Yeah they are great bit of kit, as for storage I have mine hanging on the wall when not in use so take up very little space, they actually sell wall hangers :-
quickjack.com

Wall Hangers Set
These sleek, black powder-coated wall mounts are the only official hangers designed and engineered by QuickJack. They're guaranteed to safely hold all QuickJack frames when mounted directly into a wall stud. Sold in sets of two.