As the title says, I think a minigame where players can drive a Trash master is needed or could be fun to have.
Players needs to spawn a Trashmaster and do /trash (or whatever) to trigger the minigame, and then they will need to pick up / go to atleast 10 trash containers (to prevent cheating by memorizing the pick up places and get easy money)
After the player has been to those 10 locations (out of maybe 40 Trash containers), then the player will receive a money prize of $5000.
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OBS: I think it only should be in Los Santos, due to its large area and many trash containers.