this is just a fantastic work. Love all the details, sepia works very well. fits the challenge perfectly. An outstanding image, so I expect a ribbon here. - Good luck!
I really really really wish you'd rotated this to square up the verticals at the door in the BG. It looks like you've used the shelving on the right as your vertical reference, and that doesn't work; you need to square the most central verticals; the door and the stovepipe. Then, if necessary, you can use some skew or perspective adjustment to control the edges.
Aside from this nagging vertical issue, it's an absolutely wonderful image. It just REEKS of another time and pl;ace. Well done.