When do we fly on the island?

[Erinellza]

There's also an achievement to make 17000 cowries in one week from the workshops (5 days of workshops since they require 2 days off)
which would presumably be slightly difficult and require some planning similar to ocean fishing high scores

but if 17000 is "hard"
then earning 10000 to 12000 cowries a week is probably feasible at a more relaxed pace

Is it even possible to get that much? I got 2k from challenge log and I get a few hundred every day from the workshops, lol. I don't think I can get more than 5k/week.