Ask HN: How would you build SaaS to $5k per month?

Building is super cheap now. Granted, LLMs are not perfect but they are accelerating development.

If you have start again, what would be core of building saas that makes $5k per month?

Remember, most niche are already saturated. Community building and social posting does not yield to immediate revenue.

Assume you have 90 days to archive this goal.

What would you do?