Feel free to move this.  I found this travel forum but it doesn't mention accommodation.  

We as a family are going to AKL for just 1 night with a rental car, I have been looking at lodging options.  The very few have carparks @ $25 which we are happy with but many don't.  Also what is the going rate for accommodation?  We see even motels are $160-250 a night.   

I guess motels are easier with carparks.  Many places also only have 2 large beds, we need at least 2 singles and 1 large.  Rather not book 2 separate rooms at a total of $200-300 for the night.  

Cheers.