For Rent: 500+ Bdrm, 500+ Ba, Xtra Ppl No Charge

Vaduz Castle, Liechtenstein (from Travelglobep.com)

Like it? This castle ~ and the country surrounding it ~ can be yours for $70,000/night, BUT there's a catch (isn't there always?): a two-night minimum. http://www.airbnb.com/rooms/59883

And if that doesn't do it for you, try the airbub website for, as it boasts, anything from a couch (a futon in a studio apartment in Frederiksberg, Denmark) to a country (the aforementioned Principality of Liechtenstein). In between, you'll find an awesome little tree house in Vermont (continental breakfast included): http://blog.airbnb.com/rent-anything-from-a-couchto-a-country