Dunno I know someone who doubled their hedge fund salary running a cheese sandwich wagon.
Can’t speak for the OP. But I knew the guy in Canada selling Polish hot dogs. Apparently he cleared about 150K (20y ago) working half a year. The other half he went to Poland. It’s all about the location. His was right next to a uni busy street.
> How does he make enough money to survive?
He probably saved a lot of money from his days of being a "well-paid" developer and has since lived off that.