Self-Storage For a Base Camp?

While I'd love to have my own scrap lot or building, at this point I don't. So in order for me to start hoarding and storing my scrap, are self-storage units feasible? Off the top of my head, it sounds like a good idea (a place to save up a load and/or break stuff down).

Are any other scrappers doing this? And if so, what size unit do you have or recommend?

Thanks!