I FB chatted with a friend who lives on the main island in Tonga
lived on Vau'vau (spelling?) last year.
Here is his reply:
Ask him which island he's moving to. There are 4 different island groups. As far as boats for sale
within the region, he's gonna do best searching on forums
and whatnot. As far as within this specific country though, once I know where he's gonna be I may be able to help him out.
I do know this though.... buying
a fixer upper, sailing it here, and fixing it up while in Tonga is not gonna be cheap
. Those type materials go for a premium here or will be special order depending on what he needs.
Hope this helps