I honestly think that extreme downsizing (basically cutting off the entire "back half" of the park, everything on the far side of Wild One), going back to the Adventure World/Wild World structure, might be what allows this park to survive under smaller ownership. Hype up the fact that they have oldest operating coaster in the Americas and you'll get some small tourist draw, too. Set budget prices as an alternative to KD/BGW/Hershey, market to locals, and it could be just as successful as other "small parks."What's left would be Roar, Wild One, Great Chase, and Rajun Cajun.. Nice rides but I don't know if these could carry a park on their own... they'd have to put a lot of money into a park like this, and you'd be competing with Hersheypark, King's Dominion, and Great Adventure for a lot of the same market. I don't see this as making a ton of sense, compared to properties that are in better shape and more isolated from competition.
Idlewild is an hour from Kennywood and three hours from Hersheypark, and survives.
Lake Winnie is an hour-45 from SFoG and two and a half hours from Dollywood, and survives.
Canobie Lake is two hours from SFNE, and survives.
The old SFA is an hour-45 from KD and two and a half hours to Hersheypark, and could survive under the right direction.
Adventure Park USA manages to stay in business, and I think a new "Wild World" could survive as well, especially with the water park. Just don't try to make the park more than what it is or compete against KD/BGW/Hershey, which is what the Premier Parks era Six Flags tried to do.
Realistically, though, SFA is done for, and will likely not be bought and reopened. But that's what I would do, if I were in such a position to do so.