You have unrealistic expectations though.
Lets take the Dragons for example, Every 2nd year they have hosting rights to the ANZAC day at the new SFS. There is 35-40k, Throw in being the home team for Magic round and it leaves 10 games including games against Sharks, Parra and Dogs that usually draw well.
Every week isn't possible. Sunday for example is the weaker games in the weekend. You aren't going to get big numbers for it. Just need 1-2 event games across the season.
Warriors will be home, Sharks in July have their full capacity
I dont think I do, there are two solutions that I can see but both require change and thats where the problem lies.
Reality is 7 of the current 10 stadia in use are not fit for purpose for a 21st century top tier sport. The NRL's and clubs answer is to throw money at them or to pretend they are and keep using them. Its not working as can be evidenced by clubs continuing financial poor performances that has meant the NRL has had to up the grant massively year on year to keep them sustainable (at the expense of spending in other key strategic areas) and in the total stagnation of crowds for these clubs.
The answer is to either move to Commbank or SFS stadium Ft for those clubs that could (ie Dogs, Tigers, Dragons, Souths)
or for the NRL to take control and actually benefit from having so many clubs in one city by scheduling Sydney v sydney games each round at these stadiums with a whole range of strategies that go alongside it to get people to fill them. So clubs end up playing 3 or 4 games at least at these grounds in the best time slots for fans attending.
That doesnt solve the problem of their other home stadia needing massive spends on them but thats something they will have to live with I suppose and hope one day the NSw govt throws some money at them.
I still cant see any real logical reason you couldn't have
Dogs, Eels, Tigers at Commbank FT
Roosters and Souths FT at SFS
Dragons PT at SFS and WIN
Panthers new stadium
Leaving just lobbying for new Sharks and Manly stadium developments.
It'd be a hell of a lot easier for NRL to sell that to NSW Govt than the current nonsense of spending $50mill on LO or $100mill on shark park which are a fraction of what they need to be modern 21st century stadiums.