Not to be a spoil sport, but it's rather easy to raise money and buy land; it's much more difficult to get a probe built and onto the surface of another world.

Not to be a spoil sport, but it's rather easy to raise money and buy land; it's much more difficult to get a probe built and onto the surface of another world. Plus, does that estimate include support satellites (it apparently doesn't include the costs of getting the probe there)?