We did move in with my parents for a year after I quit grad school, which lowered our cost of living significantly. But we no longer rely on family now.

I'll share numbers too: My revenue this year is around 50000€. (mostly sofware sales + some consulting) My take-home salary (after expenses, social security, taxes) will probably be around 30000€, which is significantly above the median income in Austria. It's also more than what I'd make as a junior software developer.