Whoa! Hang on! Please don't make a decision to pack your bags and move to a different country just because of what I write here.
Yes, it's true that a Dutch man with an FAA commercial certificate and 300 hours could find a job, but you need to know the following:
With less than 1000 hours you're really scraping the bottom of the barrel.
In fact with less than 1200 hours you can't act as PIC on a 135 (air taxi) IFR flight. And with less than 500 hours you cannot act as PIC on a 135 VFR flight.
Now you're relegated to flight instruction (you need to get a US CFI obviously), banner tow, crop dusting, traffic watch, pipeline/fire patrol, fish spotting...et cetera.
See what I'm getting at? You'd be kinda pissed at me if I said, "Yeah, come on over and you'll be sitting in the right seat of a turbo-prop."
While it's possible you could get a job flying in the right seat of a turbo-prop you'd probably do yourself a favor (and your future captains as well) if you came over and taught people how to fly for a thousand hours or so.
You never learn a subject so well as when you teach it. It'll make you a better pilot.
I think that's a more realistic option at this point.
Feel free to follow up.
Fly safe.