yeah mate it's not worth it. If you can get a green card easily enough then maybe, after that it's still quite a conversion if you don't have an aussie ATPL ie the 1500 hours etc. Then you're only GA job options are flight instructing so more money for that. You may get hired at a regional but I wouldn't hold your breath. Plus you'd want some US experience before you tried flying airlines here anyway. It's a different kettle of fish, not one to be getting you're feet wet in. pm me if you want more info though. Good luck.