Are you tired of quilting? Is that what you mean when you say sometimes you want to quit? Ask friends and family if they would like one of your quilts. If they say yes, give them one. If you still have a few left, give them to charitable organizations of your choosing.
Most of the quilts I make are donated. I have a few that I happen to love, and a few for grands who won't take them home because they don't want them to get 'wrecked', and a few for when folks visit.
Selling quilts would make it work for me, and, since I am retired, I just want to have fun!