Wow, this MOC is really impressing. I love the rooms inside, they are full of details. The minifig designs are excellent as well. The only thing I don't like is that the creation looks very blocky from the outside. That ruined the MOC a bit. Your score = 4. Keep it up!
The architecture and details are great. I like the way it can open and close. However, I can't really comment on the accuracy and the outside stairs kind of let it down.
Having said that, I think you deserve a 4.