I am planning go to New Zealand with my family. What is a good rental service we can look into?
Do you mean car rental? If so, I used Omega last time in NZ and will be using again.
We had a "Deal of the Day" which is an older car, and we paid the full CDW type insurance.
The car was older but we had zero problems, service was efficient, maybe a little lacking in customer service but nothing really to complain about.
You mean lodging? Air bnb often has great listings! If you mean vehicle, consider a camping van. I rented one in the off season for less than a car and stayed in campgrounds for $2 up /night. Be REALLY careful about insurance though. The cheap rental rate is kind of a loss leader- insurance is the expensive item. If you skip the Damage Waiver you have to run a charge slip for like $4000 to be cashed if you crash. Be clear about your own insurance cover before you do this!