You and I pretty much noticed the same things. The one main thing I mentioned is the size of the house. With all the rooms interconnected through long hallways, it's pretty clear the house is huge. Given that, it doesn't make sense for a couple to move into such a big house.
Yeah, but that could easily be justified because it was a family of four living in a house. A husband and wife in a house that size is still unreasonable to me. Regardless, the developer informed me that the size of the house is all part of his hallucination, and apparently this was hinted at in the game. So, the size of the house is, from my understanding, much smaller than what it seems to be in the demo. I picked up that he was having hallucinations but not that the inside of the house was part of it.