Sonkatonk

Hi! I'm new here.. I've was wondering if you guys could give me some advise. I've been making leatherwork for 6 years, and I've only shopped in store at my local Tandy leather. I'm realizing that I would like to lower my cost of materials and actually make some money... ( : How are you buying your materials to lower the cost? What store do you like the best? Any help is appreciated!! Lauren