I think I would let him commission a few quilts from me first!This way you get paid quicker (you don't have to wait for it to be sold). Don't forget to settle what your hourly charge is (it's not minimum wage, but higher). Also, remember you are a craftsman (just like woodworkers, seamstress) charge accordingly. Also, it gives you both a chance to see how the work goes (is he okay with your timetable for quilts being completed, what grade of fabric is he providing, etc.) Be sure to tell him that you need 100% cotton or if you are doing a special quilt what fabrics to get or offer to go with him to buy fabric the first few times. This could be a great experience.