Although I saw the pictures and it is clear that this is not a normal house I was astonished by the artistic overload. While traveling in the house's corridors your eyes don't rest not even for a second. Following some research and some tips, i found that the house owners are well-known Athenian artists (you should google their artworks) and that answered most of my questions. You should choose this place either from distance work or for your stay in Athens since it covers all needs you may have.
Definitely we will visit again, you should experience it at least once.