I can build them many times faster than I can sell them.

The truth of the matter is that there are not very many full-time builders out there. And not very many of those have a multi-year waiting list. Getting from the point where you have to deliver a bike in less than a year to the point where "you'll get it when you're at the top of the list," is a pretty big jump. Waiting lists are a sensitive subject, and I wouldn't go by what you've heard about various builders waiting lists.