They could also play one or two games a year in Port moresby and build a massive fanbaseProblem is this has already been done, Moana Pasifika are the soon to debut Super Rugby team alongside the Fiji Drua. The idea, especially if based around Samoa, Tonga, Fiji, Cook Islands etc, is already being done by a rival and they're based out of South Auckland.
I don't think RL has the financial power to make it viable, but also most clubs have a pathway for Pacific players, all they really need to is to affiliate the PNG Hunters with an NRL club. I'd be in full support for the Hunters to link up with a potential Perth team. Gives Perth access to immediate depth, doesn't tread on any QRL or NSWRL toes and gives PNG a professional pathway.