I am having WAY too much fun here. This project is actually coming along, and not falling to the wayside like so many of my others. I managed to build a flight of stairs that I really had doubts I could do. One of the pictures is a view through the front door, straight to the stairs. The little bathroom under the stairs won't be accessible, since that would just be TOO insane.
Also, I found a great resource for LED lights, including a kit for fireplaces, so I know how I will handle the lighting. There are actually a large number of lights in this house, and I was worried about adding heat inside a closed space, plus having a bulky transformer hanging off the house. These LED lights don't heat up, plus they can be powered by a 9 Volt battery, which I can hide inside a chimney or something. Yay!