So it wasn't true perpetual motion but he was closer than Bruce to figuring it out. If Tony sold he'd have enough money to make Salomone blush.
"This place is anything but humble," He said getting a closer look at the engine. "That is to say, this place has quietly made its self the center of society. Just think of what kind of reputation could have if it worked. Tony, you could have the Worlds Fair right here! That is of course if you can get this thing to stay together. I mean gold, really?"