Wait until you get higher; I need 33 slots to increase from 140 to 150! It does get slightly easier the higher you go, especially if you are not trying to hoard expansion parts at the same time. Much better to work on 1 at a time, and sell off extra expansion items when working on storage expansion and vice-versa. The only item I never offer for sale are the storage bars; as you mentioned they are quite hard to find. Once I get half of th ebars I need to expand, I work on getting the ohter items and it usually works out ok.
I usually cut that in half. Once I have half of parts I buy the rest.
Community ManagerCommunity Manager
