These have been on offer for a while on Groupon, I just bought the family room offer for a cheap trip to Taupo in the July school holidays.

From $69 in private room for 2 people, 2 nights  http://travel.grouponnz.co.nz/en/deals/720351455

From $129 in private room for 2 adults, up to 4 children, 2 nights http://travel.grouponnz.co.nz/en/deals/720351669

Not bad for 2 nights accomodation.