I am from New Zealand (lower S. Island), I love it believe me its not fairyland. Where are you thinking OP?
Yes the scenery is nice but it doesn't pay the bills (NZ is expensive!) so you really need to have a reasonable income as it is expensive. Not being a negative Nelly OP, but there its not all a bed of roses - horrific poverty, homeless, abuse and suicide rates (above the UK and near the worst in the OECD). Also earthquakes..
If you do have a reasonable income it is good place to live and bring up children. I grew up rurally, I went to a rural school by the coast - mufti and we spent a lot of time in the outdoors in the summer (beach, sport etc), the beaches are lovely. The school rules are much less strict, and the curriculum is less intense especially at primary, which I loved - its not totally focused on education.
But the isolation is tough, we lived in the UK for 15 years and I was lucky if I managed to go home every 18months for a couple of weeks - its expensive for flights, uses a lot of annual leave because if you pay $$$ in flights so want to be home for a couple of weeks. You have to be prepared to miss weddings, christenings, funerals etc and god forbid dying relatives. And travelling 30hrs with young children is not for the faint hearted...
I suppose it was easier for me, I am an only child and my dad died as a teen so it's just my mum as immediate family and she is retired with a decent income so she visited plenty.
But the shoe is on the other foot now, as DH is a Brit and we are in Australia. Its hard, we saw DH family regularly and the kids do miss their grandparents / cousins / uncles / aunties, DH family are loaded so can visit often but its still tough which is why this isn't a permeant move. E.g BIL and SIL have just had a baby but we won't be able to meet it until next year when we go over for SIL wedding. Cant afford / have AL for both.
Essentially, you need to do the sums after factor in housing costs ($500+ in rent if in AKL/ Wgt), food ($150-200), petrol ($80 for a tank), GP costs etc and see roughly if you can afford to go home once a year at a minimum, and standard annual leave is four weeks too (on the bright side you are entitled to 5 statuary sick days per year) so need to factor in that too.
But it is easier to visit at Christmas time as its summer hols for kids, private sector is generally shut until 7th Jan, even the whole of January its pretty quiet in NZ as everyone is on holiday.