I think your prices were also to low. I charge that much or more just to handquilt a top. I also charge extra for the batting, backing, marking and binding. The only customer I ever had who was willing to pay was a woman who owned a custom framing business. She had a collection of tops her grandmother had made that she wanted finished.
My most recent would be customer was a couple who had at least 50 T shirts they wanted made into a quilt. I told them basically $10 a square foot plus materials. They never came back. I have a feeling they were picking my brain in an effort to do it themselves. Good luck with that project.