I thought about doing a coconut/jaggery brew myself to serve with Indian food, a sort of palm wine mockup thing. Interesting!
Plums are fantastic for beverages (recently converted devotee of slivovitz, here!), and this sounds quite interesting. Not that I could duplicate it, without a wild plum tree, but still.
THREE packets of yeast in TWO gallons? I hope that it gets started or something must be wrong, because thats a LOT of yeast, there. I used to use two packets but recently I've been using 1 packet per 5 gal, for wine, cider, or beer.