Once you’ve purchased an Auto Shop, the automotive community will welcome you with open arms. Even to its shadier bits, like completing Robbery Contracts and fetching foreign cars in Exotic Exports. Both of which will earn you 2× GTA$ and RP.
Don’t neglect the front end of the business, though: this week, customers will pay you 2× GTA$ to customize their vehicles to their requested specs (or you can let your imagination run wild and risk them not liking your handiwork) in Auto Shop Client Jobs.

