When I worked/owned an outdoor retail store we always had "pro deals" and discounts to the employees. This not only gave said low paid employee a chance to buy gear but also encouraged them to wear them at work. Pro deals always came from the vendor and were usually at cost items or deeper discounts.

Im sure in the custom and hand made kilt business it is quite different because you arent getting a "label" or "brand" to sell. Yet Im sure there are various qualities or price ranges of kilts and other items. Price point items get people to buy your product and when they are happy they are apt to spend more on your high end products. I have been to some of the many shops in front of the Edinburgh castle and there are quite many tourist shops with low end tourist kilts that will never be worn. Yet to distinguish yourself from the "other shops" I would think an owner creative enough to have some employee/store kilts made that the employee could buy on time at a reasonable price. I know if I could work in a place and wear a kilt I would.