If she responds after you fb message, take her fabric shopping with a pattern in mind. Do the math while in the store. Will give her an idea of the fabric costs. I take my clients shopping all the time. They pay for the fabric before I start. Any boo boos come out of my price. Decide what it is worth to you. Keep the pattern choices simple, if they are for children, nothing fancy. If you aren't comfortable with the pattern, say so. Keep it within your skill level and both of you can enjoy the experience. Have fun.