Add to the mix that NZ women's football is much higher in world ranking than men's football, and we could get into a situation like the US, where women's football gets the attention over the men's game.
As to where players will come from... well, where did the Nix get its players from? NZ players in overseas comps, Aussie mid-rankers, the occasional overseas wanderer. The big question is of course how NZF would react to women players being pulled south from Auckland. Perhaps we'd have to have a separate W League franchise based out of North Harbour, although I wouldn't give you good odds on that.
NZ women's football is much higher ranked than than the men's because there are far more countries that men play football than women.