This is such a small quilt you may be very pleased at doing it yourself. Even if you just quilt it on the diagonal every 1" you would be done in no time, then just put a nice binding on it. This is how I did my very first quilt and I used 1" masking tape and stitch on both sides of the tape, removed it and then reapplied it 1" from my previous stitching
You would save $ and have a great job, If you wanted to quilt a pattern on it, I would still free motion with your domestic machine and do stippling, it looks great and is very forgiving, again the client would be thrilled!!