Not sure how your split level is arranged, but you might be able to use the hoe to raise a section of ground enough to put your fire on, either inside the house or close enough outside so your bed is in range. You used to be able to put a fire on core wood beams but they stopped allowing that. The other option is a stone floor if you have access to iron and the stone cutter.

Usually when I do an elevated split level house it's on top of a rock, sometimes in one of those stone circles, and the fire can go on top of the rock.