Hi Nancy8
Here are some links that might help you.
Read More
New Zealand nationals or permanent residents can be employed as domestic staff without restrictions. However, domestic staff in New Zealand can be quite expensive and limited in availability. If you bring a domestic staff person from a prior assignment to work for you here, you must acquire a visa for the person. Check with the New Zealand immigration authorities for further details.
Read More
and the above is a rather old thread but might be helpful.
If taking a helper to NZ is like taking a DH to Canada, I do know the job description will be very different. Childminding and housecleaning are two different jobs, your DH would do one.
Good luck, hope these help.