How much should I charge for dog-training and sitter?

I’m an experienced dog trainer (I’ve fully trained my three dogs, as well as several of my friends dogs which included a pitbull, rottweiler, and german sheperd) and needing some extra cash for how everything is so expensive these days, I want to take up a part-time job of dog-training and sitting. How much should I charge? What would you pay for a personal trainer? By the way, I’m 17 1/2.