I wouldn't even do it without a $500.00 deposit to start with. All of your time is worth something, including design time, shopping time, etc. If you have to order something specific, the customer pays the shipping too. And you need to make sure up front "how queen size" she wants. Queen size can vary quite a bit since mattresses vary in thickness and she may be thinking of a queen bedspread that goes to the floor. Nail down as many of the details as you can up front and get a non refundable deposit and do not sell yourself short!