Deep into the great-grandkids' pockets. It's all funded by taxpayer debt. Those who profit most pay nothing; they got huge tax cuts.
Any small region the US focuses on will be quickly annexed using cruise missiles, daisy cutters, and other hi-tech weaponry. Small regions require only small armies to secure. The Green Zone in Iraq is a good example. Also the US took over the southern Iraqi oil fields and oil ports in the first day of the war and has held them since.