The rest is pay for himself. It probably takes 6-10 hours to build a pair of jeans at the level he is doing it at, and that leaves him making a reasonable hourly rate

Also, there are development costs, etc.

Finally, the manufacturer isn't seeing $200. They only get the wholesale price (if they are lucky), or a percentage after the sale. With factories often needing payment upfront, and the brand not making money until after a sale occurs (if ever), there is a lot of risk that needs to be priced into the product.

How a about costs for the salesperson in the US? Rent for the store? Branding and marketing costs may be huge.

I recently looked into hand made automatic watches. The main difference between the major brands and smaller (EU based) unknown brands seems to be marketing. You can't pick up a life style magazine of visit an airport without advertisement for watches. This costs money.