All of these discussions seem premature without understanding the customers budget. Bar owners are Notorious for wanting to spend as little money as humanly possible and cut every corner they can to save a dollar to make something work. From what was stated the only known problem is a couple of boxes that fall off or loose connection. The term “updates” can have fast financial consequences. Is he willing to completely re-engineer his whole system that basically already works? If so at what cost?
I AM responsible for typographical errors! I have all the money I will ever need - unless i buy something..