A giant house: Too much of a good thing?

Mansion has five stories -- mostly underground 
At Yahoo Homes, we've written about a tiny home adorned with tomato cans and grocery bags, young designers' experiments with college housing that fits in a parking spot, and even (our recent favorite) a TV star's tiny, clever house.

With the video above, we bring you something completely different. And as it turns out, the challenges can be unexpected and daunting when your residence is:
• A 20,000-square-foot mansion in Paradise Valley, Arizona -- with a 9,000-square-foot garage. Or ...
• A practically diminutive 11,000-square-foot house in Golden Beach, Florida, traced by a 37-yard-long swimming pool. Or ...
• A 51,000-square-foot behemoth in Rolling Hills, California, that was 17 years in the making. Or ...
• A 14,000-square-foot Maryland island home with its own full-bar nightclub and bandstand, headed to auction this weekend with no minimum bid.
Owners who decide that carrying such a property is too much often discover that selling it isn't easy either. For one thing, even if you find prospects with the wherewithal to buy, just showing a house like that can take a couple of hours. LINK
Click for gallery.
Click for gallery.