Your living room demo looks great! I assume the model was created using some photogrammetry technique or did you build the 3D model from scratch?
Btw, for historical sites the actual reconstructed model itself would be the first problem to solve. If you live in a place with some historical sites, I think you can approach your local tourism/museum dept with this concept to see if they would be interested. Also approaching history/architecture department of top university in your place could be a good idea.
Also you can share this need gap with history/architecture forum to see if anyone else wants to see this problem solved and may be collaborate with you.