NASA rolled out its detailed lunar plan to the White House yesterday. The plan, called the Exploration Systems Architecture Study, is to spend $100 billion (USD) over the next 12 years to design and build spacecraft to take astronauts back to the surface of the Moon by 2018. The plan will go before Congress on Friday.
From Space.com: " NASA's plan envisions being able to land four-person human crews anywhere on the Moon's surface and to eventually use the system to transport crew members to and from a lunar outpost that it would consider building on the lunar south pole, according to the charts, because of the regions elevated quantities of hydrogen and possibly water ice...One of NASA's reasons for going back to the Moon is to demonstrate that astronauts can essentially "live off the land" by using lunar resources to produce potable water, fuel and other valuable commodities.."
So, this begs the question, "Is is worth $100 billion dollars to go back to the Moon?" Even so, to me, $100 billion seems like a lowball figure.