I think of it it this way, 50 to 100 years ago there were no quilt shops or walmarts. People used what they had on hand to make quilts. What fabric lines that were available, most couldn't afford it. A lot of these quilts and their batting still exist.
I use what I can afford. If I make one that holds up for the next 5 or so years, I got my moneys worth and it was well used.