I've been involved with many types of investment portfolios. Owning storage units is a very specific type of investment in real estate and quite frankly the rules that apply to commercial buildings, apartment complexes and residential properties don't really come close. Keep in mind that just like movie theaters the biggest companies tend to have the better results with occupancy. Smaller mom and pop type places or single owned ones tend to struggle more often than not. Location, location, location is very very true in this type of investment. There are many upsides for sure, but there could be better investments with less hassle than trying to keep 200 to 500 units constantly rented. For the money one invest in this type of project they could have a commercial property with a triple net lease and reap much better returns. Of course there is a market in the right location, but it boils down to getting the right location for the right price. The amount of money you are wanting to invest may dictate the best returns on an investment.