What side hustles have you personally seen work pretty well?
Corporations taking over side hustles seems to be screwing over people, since they take such a large cut and flood the market for that hustle.
But the ones I've personally seen people do that work pretty well (in USA) are:
Stay at home mom watching another kid (legally dubious depending on state/situation. But I ain't no narc.)
A neighbor of my mom's sends out a menu saying what she plans on cooking each night for that week, and for $X will deliver you some as well (Legal in Utah due to special laws, other states could be dubious. )
People who go pick up free furniture that is pretty trashed, and then refurbishes it and sells it. Or people with trucks who are like "Will deliver furniture for $30 in X area" is also pretty life saver for people without cars/trucks. Was able to get a super cheap/nice coach because of this.
People who just flip free stuff or stuff from thrift stores without doing any improvements annoy me greatly though. We broke and you're just driving up the price!
None of these generate a ton of cash, but I like that they take very little up front cost, aren't disruptive, and mostly take labor.
Graphic design of print on demand products. I started it in 2017 when I was between jobs, put in serious effort for about two years, I still make around $200 a month passively from it. Doesn't pay all the bills but it does give me a decent chunk of beer money.
I'm now exploring choice mushroom growing, as there is a shit ton of money to be made in oysters and lions mane rn.
Ooh I tried growing some mushrooms before! I got 2 good harvests and that was cool, but didn't seem worth the effort beyond the fun factor in such small amounts. But with some of them costing $10 a pound and being able to be grown in doors if well ventilated, I bet if you get things going you should be able to make decent money without a ton of effort.