I was thinking about this when we were all sure the nix were being kicked out.
I thought you could look at the destinations that have direct flights from NZ.
So it would be 3 teams from NZ, (4.5 million people)
a team from Fiji (750k people)
a team from Tahiti/French Polynesia, (250k people)
a team from New Caledonia (250k people)
and a team from Hawaii. (1 million people)
You could also have an OFC 11 from the remaining OFC nations and base them in Auckland.
That's 8 teams, although four of them are based in NZ you could add another NZ Team (either from one of the regional cities or a second Auckland team) and a second Hawaii team to bring it up to a ten team league.
The way I see it, Fiji has the population to support a pro team even if they don't have the money. It will be the only pro team in a country that is clearly very talented.
New Caledona and French Polynesia don't really have the population but they have quite a high standard of living and the connection to France. This will also be the only pro sports team in the respective countries
NZ has the population and money (relative to the rest, we will have the largest ratio of teams per capita but also the only country with competing professional sports franchises)
Hawaii has the population and money and as far as I can tell no competing professional sports teams.
Even though Hawaii is clearly not in our confederation there could be some dispensation as they don't have any pro teams, and geographically they are OFC if not politically.
Air New Zealand flies between all of these destinations, and most of them can reach each other with their respective national carrier. Half the games would be played in NZ anyway.
You could add Solomans, PNG, etc. as they all have (relatively) large populations but the logistics would be bad, you'd have to look at conferences then. You could also add in Vanuatu (250k), Samoa (150k) and Tonga (100k) but they have small populations which are also low income.
Anyway pipe dreams, but a fun experiment.