We bought a tent today for $76 NZ (about $40 US) after much shopping around. Oddly, most we looked at were over $1000 NZ, and then we found this one. Also have a car lined up for the month for $750 NZ, with insurance. We thought about buying a car and selling it, but it is too much to cram into a month.
I got pretty excited about the New Zealand leg after looking at topo maps of the camping sites, there are tons of 3-4 day "tramping" (camping) trips to go on. Even if we don't get to many of those, there is beach camping, hot springs, surfing, river rafting, bungee jumping, tons of stuff to do. So we're headed off to the bush. Probably head down the east coast of the North Island, and then as much of the south island as time will allow.