How? There won't be any new A-League teams in NSW, the NSWRU doesn't want a team west of Concord. So where does anybody get a second tenant?
And if you don't have a big venue you can't get events.
Therefore there can never be a new stadium.!
Have multiple tenants. Partner with other sports. Partially fund your own stadiums. Go to the NRL to propose them owning the ground - V’Landys was talking about the need for the game to have assets after all.
There are options for whole new stadiums being built. These might be options for say Sharks/Dragons or Dogs/Tigers - they could easily look at these options if they simply just work together. Dogs/Tigers could even get MacArthur FC involved to help solidify their case even further.
In terms of Penrith they might have better luck in getting funding by looking at a minor upgrade to their stadium like what happened with Brookvale - just getting one stand for example rather than a whole new stadium
In any case sometimes clubs are their own worst enemies. They either don’t have proper negotiation skills or can’t look beyond their own self interests to find solutions. Banking on the government to bail them out all the time is not really a solid long term strategy because we all know what governments are like.