Blogging is one of the best side hustle jobs. It allows you to build a personal brand while owning your own asset. You can even write about your passions. Having a singular niche that you write about such as yoga, business, beauty, or cars allows you to build an audience who shares the exact same interest due to the singular focus. You can monetize your blog in a few ways: affiliate links, sponsored posts, or adding a shop link where you sell dropshipping products.
I surprisingly get a lot of people asking to detail their car. I never intend to make a business of it, but I love doing it to my cars and people ask me to do it to theirs. All it takes is a cheap orbital buffer (mines a used craftsman) and a shop vac. I normally get easily $100 for a basic wash/wax/vac, or $200 to remove scratches and polish then wax the car.