This sounds like a build versus buy problem. The description strongly suggests buying. You are trying to start a business. The cost of buying what you need can

This sounds like a build versus buy problem. The description strongly suggests buying. You are trying to start a business. The cost of buying what you need can be reflected in the price. Your customers will pay for the cost of your store and get what they pay for. Running a business will provide you ample other opportunities for you to pay the dumb tax. Good luck.