I have made several similar to the one grandmajo made. I don't really like making t-shirt quilts. Just not fun for me. I recently made one for a friend. I had him google tshirt quilt images and choose one. I told him after he chose one I would tell him if I could do it. I gave him a cost to make it which was not really enough for the hours it takes. People who don't sew have no idea. I gave him an estimate of supply costs in addition to my labor charge. I bought the supplies as I have found most non-sewers don't know what to buy. Shop with her if need be. I agree with others to ask her not to let others at work know you are making the quilt for her as you will soon have a t-shirt quilt making job you never intended to have. Several of my friends, friends now want a t-shirt quilt. I gave them the name of someone I know who does have a business. She charges a lot more.