You may also need to consider that, even if you give up your emigration plans now, your children may well move away in time anyway. It could be to far flung corners of the UK or abroad somewhere, if not NZ, and the situation could enforce separation on you despite your best thoughts of keeping the family in close proximity.
I'd be inclined to go along with what Taffy says and go to NZ, at least for the interim. At least you'll be doing what you want for now and won't need to say 'We could have gone after all' when you find your kids have spread their wings in different directions and you've sacrificed your plans for nothing. It could be that you'll go to NZ and find you can't settle there for some reason and will return home anyway, but at least you'll have done it. Other than that, if you do settle well in NZ, your enthusiasm and good experiences alone might be enough to encourage your kids, or at least one of them, to follow you in due course. If you don't go to NZ you'll never be in a position to rave about it to them and give them the gift of inside information that they may not have otherwise.
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Mother Bear 
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