My main guy is in demand. New clients are a minimum 1 year wait. He has a on demand list for incase someone cancels or no shows, that list has over 100 people on it willing to come at a moments notice. But if he has done work on you before you get a fast track of 2-3 months since existing clients always get preference over new ones. It's not uncommon with the artists that are on top of their game. They can only work so many hours and have houndreds of people blowing them up all the time.