What is cotton method? I've made a couple of throws -machined quilted myself -- also made some toppers using the flip and sew method. This is how I have kept the cost down. Sending out projects to be quilted can be costly -- usually it depends on the pattern used. I'm realitively new - when I improve(a lot) my aim is to make a Queen size -this will have to be sent out. This hobby can be addicting! Good luck.