I am a long arm quilter. I usually give a sheet of tips to the quilter, especially the new and inexperienced ones. I don't care what your top is like as long as you understand that It will be quilted the best way I can with what I have to work with. I can straighted it only so much if it is crooked and will have to ease and perhaps pleat if necessary. As long as the quilter understands that, there is no problem.
I charge one penny a square inch and there is a 3.00 service charge and that's it,Of course I only do free hand quilting, no pantograph etc. or tight meandering. I don't sell any backing or batting. I just like to do the quilting, it relaxes me. I play music and let the machine do a dance lol.