Hi Nicky,
This is the
Sky website for NZ with prices of their different packages. Perhaps it will tell you something on there about the kind of set up you'd like to have.
When the NZ contingent wakes up, maybe someone can fill you in with more detail.
Edited to add: I found
this where, at the bottom of the page, it mentions about a minimum 12 months subscription and an early disconnection fee. This is for Sky Digital. I don't know what it would be like if you wanted to swop to another house or even if this is possible. (Can you tell we've not had a TV in many years so I have no idea about these things
).