I think it is important for your friend to understand just how much time it takes to make a quilt. People who don't quilt sometimes don't understand how much time it can take and how difficult some quilts are to put together. It's hard when friends ask, because friends are friends and it's difficult to put a price on our time for them. So I would look at what she wants, decide how many hours it will take, and then decide how much to charge per hour at "friend rate".