Sean and Zorro's place was an awesome and unique experience. As described, the buildings are built right on top of volcanic flats and runs totally off the grid. The place is still very liveable with wifi, a fridge and a fully functioning kitchen.
The place is very convenient for the lava flow lookout and the stars on a clear night are amazing. There are a few beaches/rock pools nearby and a really great market 5 minutes drive at Kaimu on Wednesday nights which shouldn't be missed.
Thanks again guys!