I'm building a 1:144 house right now. I started yesterday and was up to 4 am.
I tend to be so self-critical whenever I do miniatures and often find that the result is not as I had imagined. But this house, I think will be nice =)
Last time I used only paper walls and ceiling, but now I used balsa wood. It was much easier. I'm going to finish the roof now, then I'll start with the porch. It is really fun to build =)