You need a shit ton of mushrooms for any reasonable mass producing of gumbo/soup, so even at a higher price the chime gains will not be that amazing I don't think..
The only option you have is to pick up each and every mushroom you see, and save them to make things. You cannot get more mushrooms unless you spend a lot of chimes on supplies, and that is undoing more than the extra profit you make on cooking.
Additionally, if you want to make soups you also need wobbegong oil, alaea salt, and ornate bowls. Even with the guaranteed 2 rare resources per long trip, it could be really expensive/difficult to get one with all 3, and you may even need more chimes than you need for the rewards lol. And if you were to do so and flag an island like that, you'd also be limited to a daily cap that might take many weeks to pay off.
Hi
27-Jul-2016 19:10:23