I probably shouldn't be answering this because I have never charged for a quilt and don't make requests unless it's for family. But, if it were me, I would make a couple of sample blocks and see how much time it takes me, then estimate accordingly. People normally don't want to pay even at a minimum wage for your time. They want you to work at the Chinese work rate of 50 cents to a dollar an hour. I am guessing that a professional would charge at least 400 to 800 dollars to make a fairly complicated quilt top, which is what I consider a Hunter's Star, and that does not include the batting and quilting.
Jenny Doan has a tutorial for her version. Looks to be easier than most I have seen.
http://blog.missouriquiltco.com/hunters-star-quilt/
The Fat Quarter has some info too.
https://static.fatquartershop.com/me...ockPattern.pdf
Just for grins, let us know how long it takes you in actual hours to make this quilt and what you got paid for it. It might help others that are thinking about sewing for the public make up their minds.