Unless she is American, or has a green card, I'm not sure your girlfriend will be able to stay in the country longer than 6 months at any one time, let alone be able to work legally. If she's caught working illegally....I guess she can wave goodbye to ever getting back in the country again. Either you need to be married or have legal documentation to prove that you can, and will financially support her. There's worse things for her to do than be a beachbum in Florida for a year, but if she's accustomed to working and earning her own income, believe me (I am speaking from experience), its no fun being unemployed and unemployable, and I would not recommend it in a million years
Plus, if you are taking the flight training seriously, and working hard to get through it all, she will be left with no one to play with. Check out
www.ins.gov for the laws on non-immigrant visitors to the US
Good luck with the flight training, its absorbing and fun to do
