You should also ask what amount of training or classes they have had. You should also ask what type of long arm work they do, whether computer guided, use of pantographs or free hand. For instance, I have had no formal training but have access to a machine at the quilt shop where I work. I've done 4 or 5 of my own quilts so far. Two were just meandering and three with templates and stylus. I still don't feel comfortable working on someone else's quilt. I will be taking some classes this year with the hope of gaining more confidence. You need to think also about how many quilts you can do in a week and what the going rate is for this type of work. I'm sure there are many more issues related to this as a home business that I don't even know about so will sign off and let other more knowledgeable people comment.