I love threads like this. So many interesting ways to make money without sitting in an office for 40 hours.
Well mine was a side hustle initially but it was always intended to eventually be my living... And it is really close to happening now, as it has overtaken my part time day job significantly.
I'm a composer! I write music for a few boutique exclusive music libraries. They tell me what kind of music they need, I write it, and they get it used in stuff. I've done it for TV shows for a couple years, and this year I've gotten with a couple publishers that do movie and game trailers. Last week I got like 2 seconds of music placed in the Blade Runner 2049 trailer - definitely my biggest one so far. But the bulk of my income is from TV shows like The Bachelor, Catfish, The Profit, and other reality/unscripted shows.
It'll definitely be my only source of income by this time next year. 😃