For two decades now, the self-storage industry has been one of the most consistently expanding sectors in the United States, generating over $38 billion in revenue every year. Cumulatively, there's an incredible 21 square feet of storage space for every American household. It has been estimated that 9.4% of households rent a storage unit, making it one of the most in-demand sectors, and almost guaranteed that at some point in their life, every person will need to rent a storage unit. Believe it or not, self-storage facilities actually outnumber that other ubiquitous symbol of capitalism, McDonald's restaurants, 48,500 to 14,350.