I like what paperprincess suggests. I've had a few people interested in paying for a few quilts. Two have paid for all supplies, but not my time; my mom and a best friend. Others have asked. Once informed that a twin could cost $200-400 decided against it. All depends on who it is, how much I tell them my per hour rate is. If I'm not very fond of them, I charge them what I make per hour at work. I also inform them that it will take anywhere from 40-60 hours to complete.
I highly doubt that she'll follow through with you. Sometimes they quit ~1/2 way through purchasing material. Deciding that it's too expensive. Good luck with whatever you decide. I hope you'll post a picture of any completed quilt! I'd love to hear back what you decide. Although I'm not on here much these days...