I feel your pain, I am a homebrewer who lives in a condo as well. I have a storage unit that I store empty bottles and carboys in. In my office/brewery (3rd Bedroom), I have co-opted the closet for storing beer. I brew on the back patio, and store all of my brewing equipment other than the mash tun in the office. My next plan, once I get the funds, is to put a chest freezer on my back porch and start kegging. If you stick with bottling, I like to run to my local bottle shop, and I can usually get a few boxes for storing 22oz bottles. I usually have 10-15 gallons of beer in bottles at any time, and the only way to store all of that is to stack up the boxes. Hope this all helps.