Your protection is professionalism. Have paperwork to document the size of the quilt, price and total costs of what is included. Also have a clause about unforeseeable problems. i.e. too small back, waves ect. If you total it out before hand everything is up front and have them sign. You deserve to be paid. Some people may try to cut your prices on you after the fact but you will have documentation backing it up. Working for others in a personal business is hard but worthwhile if you are protected.