Done some counting: after newspaper hits 1800 and most others 2000 (carwash and pizza 1900) game pretty much hits the ceiling. There is simply nothing in sight to boost your income significantly, exept tedious and timeconsuming AI gathering. Other than that, this game has the hook that keeps me coming back over and over again! Love U HH-guys.
Make it Real world version: Throw 3rd world people on nice cosy sofa, upgrade mirror to big TV, throw in some burgers and upgrade pants that they can fit.