Nice work Lorentzen.
How about a swivel chair then? that could be smaller. And what about some weapons, or a dress ;) in the attic. You know, the treasure makes you think of conquest and bravery. Why not put something that contradicts that in the attic, for laughs. Or a pick-axe lodged into the wall, from the outside, held by a hook, suggesting and old accomplice (recently out of bussiness ). A Cuckoo clock would be great too.
The fireplace could use a brown grill too, under the fire, imo. And maybe some orange transparent studs too.
On presentation, try photographing it without a flash. Put your MOC next to a window with some semi-transparent curtains, that's a cheap soft box right there. Then you could emphasize some areas easily via Photoshop (use the dodge tool), like the fireplace or the torch in the basement, maybe even some sparkles on the gold.