I live in a small town where Walmart is the only place to purchase fabric. I do have 3 LQS within a 20 to 30 mile range, however, neither has a very large stock of fabrics making the selection of colors and fabric lines very limited. I usually go into the city which is about 1 1/2 hrs drive one way to purchase my fabric and quilting supplies as I like to purchase everything I will need for a project at the same time. While I would love to have a fabric truck come to my town, based on my shopping habits, you would need to stock not only a nice size collection and variety of fabric but also a complete line of quilting supplies at a cost that would be competative with the larger shops in the city. I do think that your idea is great and I hope that it works out for you.