Sweet--lots of potential (once, as you say, their clutter is replaced by your clutter). How many are you, to fill all these rooms, if it's not impertinent to ask?
At the moment there are only two of us, but we are planning on having "the kids." And I need some rooms set aside for an office and home recording studio. (well, not need, but it would make my life easier). And we still need guest rooms. Truth told, we'll have no problem using all that space.
"We are all born originals -- why is it so many of us die copies?" - Edward Young