We have two homes, an apartment in the city and a small house in the country. Bike storage is better in the city than in the country, oddly enough. My spouse lets me keep one bike in the apartment. I keep another in the bike room which everyone in the building shares, and my spouse keeps hers there, too. Then we are using the basement (also shared) aisle for a few more. In the country, we use one of our two barns. It doesn't shield the bikes from high humidity, and they are aging more quickly than I'd like, but I don't know what else to do. Maybe one day I'll build a bike shed and seal it somehow and perhaps add a bit of heat. In the barn, I have two bikes, my spouse has two, and we have our tandem.