Knersus, I think it depends on your family size and your needs, but also on where you will be living in NZ. I have three young kids, and stay at home, so we rely on my husband's salary alone. We are in Auckland, and realistically, for us it would be difficult on less than 100k a year. If you can manage to settle outside of the main cities, the housing costs drop dramatically, and it may be doable on much less.
We hope to buy next year, but for now, rent for a 3 bedroom townhouse/apartment in a good neighborhood within commuting distance of Auckland can easily cost $350-$400 per week. Since my husband is in IT, we need to be near the city, unfortunately. Food costs are our next big expense. We spend easily $350-$400 a week there, too. But, that is eating fish and meats and vegetables, plus some prepared foods. You could get that lower if you eat cheaper foods, but the cost of food is certainly higher than in SA. Our electricity also runs $150-$250 a month. That still leaves car and petrol expenses, insurance costs, pension contribution, the kids' extracurricular activities and school fees, etc.
That said, we are very happy we made the move. It hasn't always been clear sailing, but it is wonderful to be able to walk around without worrying all of the time, and the countryside is really green and beautiful. After settling in, we're starting to make friends with some lovely neighbors, and my oldest daughter loves her school and friends. Good luck with your move!
