After the training, you can work as a FI with them for a year, but after this year they won't sponsor you to work there - it is totally unlikely to happen. If you want to live permanently in the U.S. try the lottary for the Green Card, or go for a night in Las Vegas and get married with a true american woman! Hmmmm... MILF MILF MILF
Give a look at Aerosim (ex-Delta Connection Academy).
EDIT
I see you're from South Africa. Aren't there a plenty of General Aviation opportunities? Like Federal Air?