It only has 8k seats and a current capacity of 10k. Perth will make double or triple $ playing in Perth.
The main advantage for Perth of partnering with Bears is away crowds (and members) in Sydney. This benefits the team by having some crowd support to get behind them, but most importantly it benefits the Sydney clubs by having an extra couple of thousand Bears fans at games v Perth. It mean that games v Manly will be a sellout rather than their smallest of the season. Fans will come out of the woodwork, especially for finals. An extra $50k - $150k revenue per game v Perth is a good reason for PVL and the Sydney clubs to push for Perth Bears.
By way of example, the Swans/Lions away crowds in Melbourne are 10k & 5k higher than the average of the other six non Victorian AFL teams. So surely the Bears could bring 1k - 5k to games (depending on venue).
The Jets give Perth bid some leverage over Bears. Jets are not asking for anything, they are offering their branding and pathways. The positives of Bears is more fans. The negative is games at NSO.
Best outcome is a Perth offer to take on Bears branding and pathways, with ownership and all games in WA. Maybe one Bears seat on the board. This would be very similar to when Brisbane took the branding and some players from Fitzroy in 1996 - a takeover rather than a merger.