i play the stalk market, but not usually outside of my own town. i don't have the energy to search for better prices elsewhere and guarantee that i don't make a loss, since that's kind of boring, and it's almost never a particularly big loss. (i only buy 1k turnips a week.) my strategy in all games has just been to fish and catch bugs for hours at a time. in NL, it was obviously easier thanks to the tropical island -- you could farm beetles and sharks all year round, then haul them back to your town. you can still do something similar in NH, but of course only the summer months are fruitful because there's no permanent tropical island to go to when it's a different season on your main one. still, you can make a decent chunk fishing on your island in any season -- especially if CJ is there, since he'll pay premium, which is why it's the only time i bother nowadays since i have over 41m at this point and never spend any of it.