first start locally- visit the local quilt shop, joannes, or local guild & ask who is long-arm quilting in your area- that way you can visit that person, see some of his/her work & discuss policies, preparation, prices ect.
if you are unable to locate someone on your own there is a list here on the board of quilters- you can check the list- see if there is anyone in your area- browse the pictures-see some of the work different ones do & what you like- contact them & discuss what you need to do- everone has their own (policies/prices/turn over time)
some provide batting- some you need to include it, some include thread- some charge for it-some charge by the square inch-some charge by the project- some by time... start with locating a quilter- then ask questions- see their work- find out what you need to do. good luck...hopefully you will find a quilter you love that you can build a good working relationship with
