I wouldn't rule any place out after over 24 hours of being missing. Think like a snake, snakes like to feel secure, so it probably stuck to a wall for most of the trip, try walking the perimeter of every room, they like to jam up behind stuff like chairs, couches, entertainment systems, boxes etc.

You should also get clamps for the top of that cage, something other than just a book, a snake will capitalize on anything even a book placed only on one side of the top or niether side at all.

wildlifewarrior