This is an easy way to duplicate your money and make the Goldionaire and Mule Character easier easier, less grinding.
You need 2 controllers and a USB Stick
Back up your character to the USB Stick
Then load up 2 characters, transfer all your money to the other character.
Save and close
restore your save, load up and transfer back all your money. You will have 2x the money you had before. If you back up your save now and repeat, you could keep duplicating all your money.
You can view it here
Thanks
KP