I live in the States and its a waste to go a commute like that for not up to 2 weeks.You'll be able to waste three days whole on planes and airports.Earlier than you get established on the position it'll be time to head. I spend $1200 last yr to move to Greece for 10 days and it was once a bad proposal. Your time,your money,your power,your name.

6 days wouldn't even scratch the surface of either one, let alone explore both of them thoroughly.