There are some isotopes of Helium which can be used as fuel for fusion reactors.We can bring Helium from Moon to earth and sell it here on earth at very high prices.
You are calculating that cost at level of current technology.Countries are working on nuclear propulsion and other reusable technology that would bring the costs of interplanetary travelling and setting of bases down and then it will be economically viable.
Russia and China are planning for a manned mission on mars and i am sure that India,China and Russia can team up for setting up a base in Mars in future.
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LordTyrannus