or if you're one of those people who don't want to put effort into it, hire 2-3 collectors and let them do the dirty work, while you watch or do something else, like open Kongregate again, just in a different tab and play a different game. Thumbs up plz! :D
The badge is easy to get; just play until you can buy the uzi, then stand directly below the money box, click and hold. Money will rain on you. Might be faster if you buy the max capacity to where it can hold 200 coins.
 "Coinbox Hero"){kind=icon}
 "Diamond Hollow II"){kind=icon}