I haven't thought about this too far, but it might be easier to argue a structure that provides greater opportunity for more clubs and/or private owners to get into the RL party via something like this....
Australasia RL Comp (Feb - June): a 14 team comp (13 rounds) with play-offs - Sydney teams (x 2), Brisbane teams (x 2), Nth Qld, Gold Coast, Newcastle, Canberra, Melbourne, Adelaide, Perth, NZ teams (2), plus 1 other club (e.g. PNG/NT).
NSW/QLD RL Comp: (June - Oct, including play-offs & a traditional arvo' Grand Final) - structure it however you like into conferences, divisions, promo/relegation, salary cap (or none), finals format, and/or as few/many clubs as you want, but have all the "traditional" clubs (who might have more chance of funding a shorter season) and/or anyone else that wants to form and fund a club (private ownership and/or Leagues Club)....
NSW: Easts, Souths, Norths (Gosford), Newc, Manly, Canterbury, Illawarra, St George, Parra, Penrith, Wests, Balmain, NSW Country, Canberra, Newtown.
QLD: Current Qld Cup teams, Titans, Nth Qld Cowboys, old Brisbane comp clubs, new clubs (incl. private ownership).
Every club gets to stay alive under the above.