How much does it cost to own a mansion monthly?

The cost of owning a mansion, on a monthly basis, varies considerably, because there are many different kinds and sizes of mansions, and because mansions are also in different locations, and different locations will have different rates of property tax, as well as different rates for utility bills. Different locations also have different climates, and hence, different heating or air conditioning costs. However, in general there are substantial costs to owning a mansion.