So, Bush wants to go to the moon again. At least, he wants to announce it during his last year to try and boost his popularity before the election. He's already screwed the economy by borrowing huge amounts to fund tax cuts and a couple of semi-major wars. This is what happens when you put a monkey in charge.
When dear old dad proposed the same thing, Congress estimated that it would cost $400 billion. I think we can safely say that it would actually cost a fair bit more than that. And for what? The first lunar missions were basically a world-wide moonie at the USSR. Certainly, it did wonders for technology, but given the price, I would certainly hope so.
But what's the point this time? There's no USSR and we've done it all before. Go do something useful like asteroid mining instead.