I go for more accuracy. I think it's fun trying to make the house look as realistic as possible. But if hallways or rooms are too narrow and look like they might impact game play, I just expand by one or two tiles. So for the bedrooms you mentioned, I would just make them a bit bigger so they would be comfortable, but I don't think that would impact the accuracy of the real house, just adjust everything else accordingly. For me, if it looks the same on the outside, then it's a successful recreation.
Also, can we see the house/floorplan? It sounds really neat, and I want to see what you've done with it!
