Rigger to answer your question is I don't know. Personally, I think that there is to much of a wood look on the inside of the home. The bathroom (that is coming) however is going to be a tiled job.
And no, I am not going to close the bottom section if I understand your question correctly. The home while trying to maintain the old Thai style also will have an open-California-style about the place. I am trying to keep the interior walls to a minimum.