Stop in for a cup of coffee

18th century house... there's not 3 feet of level anything... The planking on the walls and subfloor is amazing. 1 to 2 inch think planks up to 22 inches wide. He rigged up one, large cast iron radiator for heat... keeps it at about 55 degrees....
It's gone from how sturdy can I make to to how cheaply can I make it