I was in a quilt shop the other day and they said a friend of their's charges 10 cents an inch for quilting. I would make sure I got the money back for the supplies and see where that comes to my $400 to $500 esimate. My quilt guild just spent $265 on fabric for a queen/king size quilt. not including battin, or thread or the piecework or quilting. Charging a friend is hard but time spent is another thing. Good luck.