A lot of the money comes from govt. programs for specific small business. I know because a distant relative has a piece of the pie in a lot of small businesses of specific ownership.
They are small businesses, but the building and expansion comes from money through mandated subcontracts to these small business, which supply some building materials, office workers to bookkeeping and such, and labor for building. And it adds a LOT to the cost, but the money rolls in and is basically mandated.