Write down a list of questions you have about this arrangement and have a good talk with the man. Tell him how long it takes to make a quilt, what size does he expect, what does he plan to sell them for and what do you get out of this project. Make one and see what he does with it and get everything in writing, his share your share and find out the going rate for quilts. And like Barbshobbies said, expect to see the sales slips. This will be a business proposition so look for the legal aspects too. You would be setting up a home based business.
Carol J.