For the Sharks, asset rich means they have a financial backstop - if the budget crunch becomes too severe, they can sell assets to get them out of a jam. In a worst case scenario, they could sell Shark Park to developers & move to the SFS.
The revenue point about the Bulldogs is interesting - is that basically just due to them being rubbish for a few years now? In a lean time, the supporter base does tend to boil away to the hardcore fans only - I imagine an upswing in form *could* change that, and some signs of that are on the field now.
And lastly, Wests and Campbelltown - I've heard it said that the reasons they don't play at Campbelltown more often include relatively poor stadium, lack of corporates there (compared to inner-west), and the Balmain & Wests Ashfield factions really not wanting to go there that often. Would the crowd numbers at Campbelltown grow if they committed more to the place?