Sorry i am not a long armer pro, but i have a long arm that i do(with the computer) my own quilts and it just takes a good time and a lot of work to quilt, and that is just not worth it.
I still send out the king size ones to someone who i consider very reasonably priced because she adds $20 to the length of the king size, so my finished top of 115x115 for example will cost me $135, and that i consider really fair compared to others.