Not too sure about having your own shops/renting as it will only be alike trade tables, I'd suggest just add old shops that were taken away few years ago. But, some people may disagree because of the rarity of the items/hats whatever it is. I'd have to say not only old items, but new, new is cool too.
Overall this is a pretty cool idea.

Plus, the plaid shop is still open, just look for the yellow arrow of flowers pointing between two trees on the right side of the map in the northern map.