I've just gotten back from one of the those self-storage places and they had a load of motorhomes and cars in there as well as the locked rooms. I am looking for some extra space as well to move out furniture that belongs to the house so I can use all the garage space as a workshop. You might want to look at some form of self storage?
Loknstore was the one I looked at.
May or may not help but you never know ..