I'm not currently looking for another job because I'm moving country soon (And they're letting me work remotely). It's not that my lifestyle in general is expensive, but when I see a Wetherspoons I can't help but have a cheeky pint or two (Which adds up at the end of the month).
I have won money from hackathons before but they're normally in the week when I work, which is a shame.
You say you are moving country so I suppose you’re flexible. Try giving Poland a go. Polish language is not required to land a job and dev salaries compared to cost of life are insane. Just avoid Krakow for the pollution
Is your lifestyle or your city expensive? Do you actively apply to jobs with better salaries? Have you asked for a raise recently?
Passive/side income often results from luck and lots of hard work, despite the stories you see on HN making it look easy.