If I were you, I'd first go see what finished quilts are selling for at any local quilt shops, paying particular attention to the price as it relates to the size of the quilt, the complexity of the pattern, and the quality of workmanship in comparison to what you feel you can do.
Then I would go up to Center Harbor and do the same thing with all the consignment quilts for sale at Keepsake Quilting. If there is a branch of the League of New Hampshire Craftsmen Gift Shop in your area, that would be another place to check prices, though they will surely be much higher than the others.
Those three venues should give you a range of fair prices here in New Hampshire and who wouldn't jump at the chance to spend a day at Keepsake doing "research"?! :wink: .