As a kiwi who lived in NL for 5 years, my wife and I are also homesick and are planning our way back to NZ. For sure people will say NZ is bad but really I feel its the same everywhere. NL is a great place and you can't go wrong staying there too.
My wife also finished a Phd in NL and I suggest you should finish that if you can as its an amazing opportunity and awesome that you can do that while getting paid a living wage.
Currently in the US as I've been transferred over for work but hoping to loop our way back in the near ish future.
My main suggestion for you is to plan and save up to prepare for the move as the more security (financial) you have during the move, the easier it will be.
Goodluck on your study and follow your heart.