To me the place to live there is North Part of the North Island... a place called Bay of Islands... that's where the warm water runs in for the pellagics.
If somebody is into skiing... the South Island features the "Southern Alps" Overall unmatched beauty on both islands. If you schedule a trip down there for a couple of weeks, you won't want to go home. Warmest time with the least amount of rain and moisture is around January...and it does rain a lot.
I looked seriously into NZ during 2016 election. It would have been easy if I was under 65 because they need you to bring $1.5 million US to invest in NZ. That was no problem, but in my age bracket they need $10 million. That was out of reach for me.