You will get many different opinions on this subject!!! There is no right or wrong answer for this question. I am a firm believer in buying and using what you can afford and/or want to use. There is absolutely nothing wrong in using non-LQS fabrics when you make a quilt. Remember, back in the day, quilters used whatever they had on hand. There wasn't money to purchase fabrics just for a quilt. Quilts can be beautiful, usable and durable from fabrics bought at chain stores and LQS. Use what you want. There isn't any quilt police!!!!