I am a longarm quilter and also love to do binding. My favorite is to finish by hand with a ladder stitch and 1/4" or smaller stitches. My charges are by the linear inch and include making the binding. There is an extra charge for bias binding. $.30/linear inch for hand finished. $.18/linear inch for machine finished. $.12/linear inch to just attach the binding and you finish. Our business is called Silver Needle Stitching, LLC, as you can see below.