It's very expensive to train for both EASA and FAA at the same time, mainly because you're very limited on the number of schools. If he's planning to start his career in the US then it's also unnecessary.
My advice is to get FAA private, instrument, commercial, multi, and all instructor ratings, then teach in the US. Once he's got 1500 hours, everything will become a lot easier:
1 He can get an ATP
2 He can get a job at a US regional
3 With his ATP he's exempt all EASA theory training
4 With his type rating he can covert to EASA in a SIM.