To get infinite money, u need at least $45, 000 in game money, then go to settings and press restart rebirth 1. Then like always you will have the great items. While you are in the game tutorial, pause then press character. Now go to the infinity blade. Now master it using the money mentioned above (where it shows the item's xp look to the far right of the xp then press the arrow). Now you are able to sell it (u might need a good weapon to finish the tutorial), now finish the tutorial and start rebirth 1. Pause again and restart to rebirth 1 (repeat the process as told above but you don't have to master it again). Keep selling the infinity blade and you'll be rich (this also works with the other items)!