LOVE this quilt!!!! Will definitely put this on my bucket list! ha!
In regards to the pricing...did I see somewhere on this site that someone recommended 5 times the amount of the cost of the materials? That's probably too much for your friend.
On the other hand if she does want to give you a fair price (one that you both agree on even if it's lower than what you might sell to others) you might consider letting her pay it out over a period of time. That way she can budget for it and stay within her means and you get paid a fair price.