Why not release it in modular form? A couple of rooms at a time that will each load in the correct position related to the others. The exterior could be separate as well, in one or two pieces - perhaps with an additional LoRes exterior version for distant views in renders. Seems that would make it an extremely versatile package that could be used in all sorts of circumstances. Folks with really high-end systems could load the whole thing, and lower-end systems could still get a couple of rooms and a Mil-Figure or two in their scene. The opening/closing doors is a really good idea, but in most poser houses there's nothing to SEE once a (for instance) closet or cupboard door is opened - hence my "clutter" suggestion.