Check out the Bureau of Economic Analysis. The economy has been picking up since the tax cuts went into effect. Thus tax revenues will increase.

http://www.bea.doc.gov/bea/glance.htm

You say our forces are sprea thin? Then lets drop the 'peacekeeping' missions in the Balkan's, Liberia, and other little hotspots which do not affect US security. There was some comments about our 'butting in" to the affairs of other nations, so by all means let us drop these multilateral "peacekeeping" missions which are done for the interests of the UN rather than for our own national interests.
For that matter we can pull our troops out of South Korea too. South Korea has a modern million man army, they can protect themselves. North Korea's nukes can still be taken out by our stealth bombers if/when it becomes necessary for US to do so.