$65 for completed queen size hand quilted = low!
I suggest you establish a per/inch price for different types of quilting i.e. crosshatch, in the ditch, simple design, complex design etc. Ask other hand quilters what they charge as a guideline.
Also set a price for binding (future customers may choose to do their own) My quilter charges .15/inch
Then you will have a standard to follow & won't be in the same situation when the next person comes along.
Also offer a 'family' discount on total cost. 15-20% seems fair