CodesWhile playing, enter one of the following codes.
|hold L2 + R2 and press Circle, Square, X, Square, Triangle(2)||INFINITE AMMO|
|hold L2 + R2 and press X, Square, X, Square, Triangle(2)||INFINITE RESPECT|
After the mission where you dump Mario's body, you'll be in a casino. In the casino, you can pick up a few credit cards at the bar for about $1000 each, as well as a cell phone for less money. Pick this stuff up and go use a slot machine. As soon as the slots come up, exit back into the casino. The phone and cards will be there to grab again. Repeat until you've got enough moolah.
Thanks to Revolution Reader SneakyPeanut!