If you are considering selling on Etsy - do a lot of research to see how many other quilts like the ones you will make are already on there. Some items are in abundance and the chances of all of those selling are slim, but if you have something that isn't real common then there is a better chance.
I got a bug one day and decided to make a bunch of bibs, then I looked and I think there was 10,000 of them...I sold one - have since taken them off and given them away.