True, but states like Florida and Texas also generally have larger yards than Baltimore area homes. I would think homeowners there would more likely opt to pay a one time upfront cost to buy/build a shed instead of recurring monthly fees for a storage unit that, within six months to a year, total more than the cost of a shed.

Obviously this is generalizing what the "typical" situations are and assuming that these folks are good at these types of decisions so this comment and my previous one don't account for every storage unit user's situation. I'm also sure there's a huge spectrum that folks fall on between hoarder and minimalist.

I do, however, believe that there are likely very smart people who watch various market trends in order to make highly educated decisions about when the right time to build a storage facility would be. My previous comment was only intended to point out that a layperson like myself only needs to see the product of these smart people's decisions in order to get an idea of what they're seeing.