The group I belong to does a raffle quilt each year. We have discovered over the years that scrap quilts seem to sell more tickets. Also the guild buys the background and each member donates some fabrics. We usually try to have one person do the cutting and piecing to keep things the same size. One persons 10 inch block is not the same as the next persons 10 inch block. It is so much easier that way, than trying to resize a bunch of them. Good luck with your project.