There's a lot of good advice here. I agree, all you have to do is go to any of your local quilt shops and they will give you a list of Long Arm Quilters. Most Long Arm Quilters that are looking for business will have business cards and prices available at each local quilting store to help promote their name - because they want the business of course. I recently bought myself an A1 Long Arm, and wanted to do professional quilting on the side, so I went to 3 local quilt shops and left my business cards there. Since I've done that, I've been super busy and currently have 9 customer quilts waiting for me. As far as how much they charge, it's pretty basic for prices to start at one and a half cents per square inch. It goes up from there depending on how much quilting you want, how custom you want it, etc. Good luck!
Judi