All you need now is the knowledge of how to use all the stuff you're about to buy! Just FYI, while starting up a 'car wash' operation is relatively simple, starting up a 'detailing' business isn't; and if you plan on actually using that
G110 on your list, I would strongly advise that you practice for a few weeks or even months on your personal vehicles before taking it anywhere near a paying customers car, who has no idea you just bought the thing and have never used it...
Good luck...