Taking the car across from Wellington to the South Island on the ferry, if that's what you are thinking, seems to me, IFRC, it was pretty darn expensive. A quick look at the InterIslander Ferry site makes it look like it might be about $300NZ one way for car plus 2 adults. NZ$ about 80% of US$.
We sort of looked into buying a used car, and then driving, and at the end having to sell the car when we were last there. Renting was easier, and you don't have to take the car on the ferry trips, which saves as well. Rental for both islands is just one rental.
1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27
previously owned since 1964:
62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6
Last edited by Del; 12-02-2014 at 01:27 PM.