I don't know what Fallon's prescribed fermentation period is, but I imagine it'd take more than just a few days...but maybe not.
If you're inoculating your ferment whey/LAB, keep in mind that letting this ferment go for a long period of time is probably going to produce a very sour drink. There's nothing wrong with that, but it may not resemble what you're accustomed to as hard cider.
If I were going for hard cider, I'd skip the whey and salt, and aim for a yeast-dominant ferment using either wild yeasts from apple rinds or a pedigreed yeast.