Guys, by the way, for a couple of events that will happen in the next update you should have at least 100,000 in your account (if you already figured out how the ATM works), or in your pockets.
Or a little more if you don't want to be at zero coins.
Fishing for big fish and sharks is what brings in the most money, as well as selling the lobsters from the special harvesting mission. But for that, you have to pass the normal harvesting missions at least once to unlock the next one.
(The other jobs are not as well paid, but the MC does them to help the community, and they also help some NPCs to like you more.)
There is a trick you can do with the big chest you find in the abandoned hut, to have an unlimited supply of money, but you need to use the ATM. (That will change in the future and I will leave a fixed sum, I don't know how much yet... so you should take advantage of it while you can.)
In the next update I plan to incorporate treasures throughout the islands (the small ones), but you will have to be prepared to deal with some “competition” for them.
So that may help you to have more money, but until then...