Flight schools are hiring like crazy at the moment as they lose pilots to the airlines. Many of the large academy type schools in Florida, Texas and Arizona will hire their own as CFIs once they complete their training. If you're considering a university aviation program (UND, Embry Riddle, WMU, etc.) you would also have a great chance of getting hired. There are plenty of CFI jobs in the US if you know where to look, and many of them will enable you to build 100 hours per month or more.