long arm quilting prices vary region to region and city to small towns like it has been stated. I longarm for others and I do it mostly as a hobby and to keep me buying fabric..hehe. My fee is .01 - .015, I don't do custom and just hand guided edge to edge pantos. I do have a minimum or $35. because I sometimes get baby quilts that are 36 x 45 and that would be $16.20.
The prices around the Central CA are a little lower than in So. Ca.
Some quilts are a breeze, backing squared, borders secured and not wavey. Other quilts have flange or are pieced on top and bottom, these take extra work, time and many times breaking thread and thats on the quilter's time.
I have a customer that always pays me more than I quote, very appreciated.