...But any real Capitalist would then see the opportunity to stop investing in real estate, leverage his real estate as collateral, and build more houses. Thereby increasing supply, and creating even more wealth by offering his new houses to the other players.

Of course this would pressure the house hoarder into building hotels... Except each other player gets a set of dice, and on rolling anything higher than a 4, his hotel construction is thwarted by decree of the community's zoning board. UNLESS he's making deals under the table, increasing number he has to roll under to get approval from the zoning board.

And so on, and so forth.