My big moneymaking scheme, is:
1) 360 spots on ginger island to grow Starfruit
2) 3x beehive formations, each one centered around a Fairy Rose flower with 44x hives (total: 132x), on Ginger Island, next to the crops space
3) 119x Ancient Fruit in the Greenhouse
4) Fully upgraded cabin, filled to the brim with Kegs
5) 5x huge tree orchards, complete with mushroom logs and heavy tappers (min-max, perfect design, from reddit), 2 of them mystic trees and the rest, 1 from each remaining wild tree
6) 1 Big Shed, filled to the brim with Dehydrators
With this, you earn crazy money. Starfruit kegging alone, results into 1 million +, each time it's being processed (~7 days?)...