Honestly, I'd say try and live with it until you start getting lots of excess Iron, and then rebuild from scratch once you can build a house frame using Wood Iron poles.

I'm still trying to figure out the logistics of converting my home base into using black marble and wood iron, but the whole place has been more or less built in chunks that has given me quite a lot of guff trying to sort out.

The old girl's ugly as sin, but she treats me right; We're in this for the long haul.