Final results (room panorama)
Materials cost for the entire project, including the room renovations was about $4,250. It took about 350 hours of my time -mostly spent on weekends or at night during the past 18 months.
Final results (bottom sitting area)
She has her own reading light inside the tree, which is a 12v fixture on its own dimmer switch (located next to her right arm on the carpeted inside wall). My wife suggested the sitting area in the middle. This feature made the whole project more daunting, but in the end, I was glad she thought of it.