If you want to do this, make sure you get to buy the material so you know it will be good quality. Be sure thread, batting and anything else included in the cost of each quilt. Also keep track of your time invested making each quilt (that is where a lot of the cost is). Since this is your hobby make sure you always enjoy it. If it gets to be work stop while you still like it. And listen to the business advise everyone else is giving you.