100% a boss fucking suggestion, would be hilarious tbh...
but I see what @.Nathan means by a money printer.
Few tweaks ive thought of.
maybe adding a 5minute timer between each theft.
parts weigh half your inventory, and the tool/s are heavy too. so you can only steal one before selling, Unable to store in houses.
If the owner of the vehicle has an alarm/tracker and you try to steal parts then it sends a message to the APD of the location and gives them the ability to track them for the next X amount of time.