100 per hr is average for custom work. If they charge you per location - find a new artist. My guy charges me peanuts now because Ive been going to him for so long....sometimes they will honor that. Stick w one guy and be loyal. My guy said he sometimes charges based on spedning time w the person in the chair (is it someone you can stand to sit with for two hours??) 
Good tattoos arent cheap and cheap tattoos arent good...

Good tattoos arent cheap and cheap tattoos arent good...