If this had any economic truth to it, there would be a market in undercutting these overpriced rents. If this were true at all, you should go to your local bank

If this had any economic truth to it, there would be a market in undercutting these overpriced rents. If this were true at all, you should go to your local bank, get a loan, snap up some property, and undercut your local slumlord by 10%. By your logic, you'd have plenty of profit to spare, and you'd be providing an enormous social good. But my guess is that you will not do this. And you will not do this because your analysis of their margins and business is not actually correct, and you and everyone else in the market knows this.