There have been many topics on this subject on the QB. Here is one link.
http://www.quiltingboard.com/main-f1...g-t286205.html
I couldn't find others but mostly because I wasn't using the correct search criteria. The general consensus is it is very difficult to make any money at quilting. Those that are successful have found niche markets such as high end baby quilts, T-shirt quilts or memory quilts. The other way some quilters have done well is longarm quilting for others for pay but that requires a considerable investment for the equipment and supplies as well as training. I suggest you go on to ETSY and see what quilts are going for. Hardly enough to make your cost of materials let alone pay for your labor efforts. The problem is most consumers are conditioned to the pricing of overseas, sweatshop labor quilts that sell for $50 or less. Of course these quilts fall apart in less than a year but very few people care or think about that and even less want to pay $500 to $700 for a custom made quilt. (and that is a low ball price!) The hand quilted Amish quilts prices are much higher.
https://www.amishcountrylanes.com/Pa...New1List.shtml
Other things to consider are what patterns you use. In order to avoid copyright issues you need to use either public domain patterns or make up your own. Most published patterns and books you need the designer's permission to sell for profit.
finally when you turn your hobby into a business it can quickly kill your love for the hobby.
I am sorry to be such a downer but it is a hard cold fact that most crafters and quilters don't make much money from their crafts.