Here is how I charge- each t-shirt $10 Each photo sheet $10.
fabric for sashing, borders, backing, and binding -according to yd. price. I charge a fee for the quilting as if a customer brought it in to me, if it is an allover my starting charge is 1.5 cents a square inch. I charge for batting. This is not a cheap endeavor. I have been turned down to make these quilts because they were well over $200. especially when they wanted lots of photos.
Let us know how it works for you.