I'm in SW Sydney.
And whilst there's a lot of Doggies and Tigers...there's a shed load of Saints, Easts, Souths and Manly living out this way.
I know the guy who nurtured and encouraged the move to ANZ purely on membership / supporter base numbers outside of the traditional Souffs territory. The financial incentives worked too. ANZ should be rebuilt remodelled as NRL HQ Central. Get all the city transport infrastructure connected to it and play key games there and the odd other game at a "suburban / heartland " ground and then take 2-3 on the road to a "Growth" market ie Adelaide, Perth, NZ2, Brisbane 2, Qld 3/4, Darwin, Alice Springs, regional centres etc.
The money is in the TV. Crowds are "extra". Nurture them right and you get growth centres supporting NRL and NRL teams and get the teams stronger.
Fish where the fish are.