This car makes a decent profit when you buy it one star and rebuild it. The Bolt Hellcat is also a fairly easy car to tackle. Just keep in mind that with the Rockers & Push Rods the engine does have a good number of small parts to remove and replace, which is time consuming.
Purchase Price: $11,468
Repair Cost: $23,540 (+/-)
Sale Price: $48,545
Profit: $13,537 (+/-)
As you can see, the Bolt Hellcat is a decent car to rebuild in Car Mechanic Simulator 2015.
Rebuilding vehicles for profit in Car Mechanic Simulator 2015 is by far the most profitable activity in the game, assuming that you're picking the right vehicles. Of course a solid supply of spare parts helps too. Here are a few links to additional information that can help you get started in the Car Rebuilding side of the game. This will help you improve your overall game experience:
Rebuilding Guide with Cost vs Profit for all Vehicles in Car Mechanic Simulator 2015
The Auctions Center - The place you buy vehicles
Complete Series of Vehicle Rebuilds for Car Mechanic Simulator 2015
Tunerz Paradize - The place to get special parts to trick out your rides