Hi there - looking for accomm in tonga / house-swap

Hi all

We are a New Zealand based family (2 adults, and 2 pre-teen boys).  We will be in Tonga from mid Dec 2012 to mid Jan 2013 for the school holidays.  Clever pants here bought and paid for the tickets and now finds that it is going to cost a fortune to stay in Tonga.  We are looking for affordable accommodation - maybe a houseswap - during this period in Tonga.  We live in Half Moon Bay, Auckland by the beach.  Have pool, spa, etc.

Even if you can't personally help, any advice or assistance as to how we may best find accommodation in Tonga on this basis would be most welcome.  We are reasonably relaxed about where we go in Tonga but would ideally like some time in Tongatapu (where my wife is from) and some time on Vavau and Eua.

As we are there for a month - western style resort fales etc will blow the budget so looking for something more real.

Cheers.  The Turners.