Despite my misgivings of the game as the author wasn't clear on why it was rigged, making it vurtually unwinnable, the point is that it was supposed to be unwinnable. Thing is you need to keep grinding out the money through the amount of times you played in the main game, and all the times you play the minigames.
If you manage to buy enough upgrades, the BINGO game will gradually tip in your favor. Believe me, that's what I did, it takes patience.