Ah, so these “massive real estate holdings” cost virtually nothing to them in construction costs, and are designed to require as little maintenance as humanly possible. In addition, their tax obligations on these real estate holdings are virtually nonexistent due to the severely discounted tax obligation they have for “bringing jobs to the area” (even though those jobs are shit). City and county governments fall all over themselves to give them as little tax obligation as possible.
Their “real estate holdings” are as much a drop in the bucket as employee pay.