The wax he's using is Zymol Royale. Sure, it's 8000 quid, but lifetime free refills.
He's no Paul Dalton (that's who I originally thought the video was going to feature), but can definitely market his services if he actually can get that much to detail a car.
You also have to take into account the liability of servicing vehicles of such a high caliber. You can lose a lot of money quickly if you mess something up.