Tee quilts are very involved if done well. I personally wash the shirts to remove any fabric softener, stabilize each square with iron-on tricot backing, furnish all backing, batting, and sashing materials, and custom quilt around each design in each square with invisible thread. I charge $20/shirt, and sometimes, considering the labor-intensive process, that IS NOT ENOUGH!!! Here's a photo of my last one---example of NOT ENOUGH because the customer wanted a collage which made the measuring/cutting process a real chore.