What if you replaced all the interior kota tiles with wood flooring? I think that a 3x3 flooring space wouldn't suffice because standing next to the fireplace means you'll be adjacent to the kota tiles. But if you have another square layer around you, maybe that space will be considered enclosed by the kota walls. Or perhaps not, given that snow is visible on the walls. But you'll at least have a fancy wooden platform by the time you finish trying it out.