Queen sized hunters star, $1,000 - $1,500 depending on actual cost of fabrics, quilting ( longarm?) based on my ( very reasonable rate of $25 an hour prepping and sewing time. plus materials. It would depend on how fast you sew- can make the top.
I keep pretty accurate records of expenses and my time when making commission quilts. Include binding, hand stitching time too.
Our appliance repair guy now charges $60 an hour- creating a quilt is also a skilled trade. You should be able to charge ( skilled trade prices)