Bubble Wrap and Saws are the tough ones for me. for expanding, I have: Tripods and shovels, have 12 each, saws, have 2 Need 4 of each to expand, oh, I did get one saw today, wow. For increasing storage I have: packing tape 17, wood crate 7 (I got rid of 20 recently because of lack of storage space, wish you could get rid of a few, and not the whole darn thing) and only 4 bubble wrap need 7 of each. Been lucky tho, got 2 bubble wrap last night, but nothing today, S8 needs to fine tune the drop rates.
Update: Sept 6: shortly after posting this is finally had a good run and got what I needed. Was able to level up a few times too. Now I'm stuck with trying to get light bulbs. No drops and I've mastered about 15 shops and still nothing. Also trying to get parts for phase 2 of the bridge. Of course the saw is the one I need. Light house is my last POI. Really need those bulbs and saws.
Update 2: Sept 6 : just an FYI.. I'm lvl 21 with 100 store slots. Haven't had an inventory issue for awhile. Keeping my fingers crossed.