will you be able to reach across the tables for cutting? are you tall enough?
on the bolt storage areas that are 4' deep will there be one layer behind the other and you can see one layer only? will you be selling bulky supplies as well? i see that the pegboard is right near the door, so you see the notions as you walk in. that's a good idea, but keep your eye on things 'walking out' with your customers. quilters are usually honest but i know the store near me has problems. also, think about showing examples of your own quilting about 3' square so customers can see your talent and have a sign underneath clearly showing prices. no arguing later.
we all wish you the greatest good luck. that's a lot of responsibility and hard work. and a big investment. where are you in pennsylvania?