What you would pay for utilities in a mansion?

If you had $20 million sitting around, of course you want that cozy 30,000 square foot house with 10 bedrooms, 13 full baths, five half baths, three elevators, a pool with waterfall and a six-car garage, right?

Now, how much will it cost you to head and cool the beast?

Estimated cost to keep the lights on and run the heat and air conditioning: $30,000. Peak air conditioning months will cost more than $3,000, according to Ruud Design Star.