Do something simple that most people don't want to do.

Pick up garbage loads for people

Spray paint curb addresses

Pressure wash concrete

Sell stuff on ebay from estate sales

Clean out gutters

Do many people have physical chores they out off and will easily let strangers do it for $50-$200

If you can find one a day from social media advertising it's a few grand a month. Facebook, Craigslist, flyers stapled to posts are good to advertise. Word of mouth is best if you do some for free.