How long does it normally take you to build a Sim house?

It usually takes me a few hours to get to a point where the house is not quite finished but looks decent enough for gameplay. I'm picky when it comes to houses so it'll probably take forever for the house to be "complete." :)

Because of this, I once had a family living in a "palace" that had only a living room interior and some bits of the exterior done. Everything else was a shell.