Exactly. Space is the key resource that we lack. People need good fences and BIG YARDS to be good neighbors.
The South Pole is slightly less hostile an environment than is Mars by a ratio of 1,000,000-1. If the penguins don't cramp your style, what about that God-forsaken place??
And by the time you or any of the Trekkies here buy a "homesite" on Mars, the Earth as we know it will have been blown to smithereens during the prophesied Armeggedon scenario...
For now, you may want to check out Siberia or The Yukon. A RE/MAX or Century 21 real estate agent may be able to help you out.