Like others here I also run several micro businesses:

1. Small medical software with a handful of steady clients: 2.5k/month
2. Cyber security platform development: 6k/month
3. Another cyber security platform: Still in infant stages
4. Another (lol) cyber security platform: Also just recently launched (but looking promising)
5. Dog hotel/daycare: 1.5k/month
6. Small resort: 2k/month
7. Dog breeder: 1k/month
8. Recently opened a Machine learning, AI and Data Quality consultancy company. Currently: 5k/month

Also it’s worth mentioning I live very remote in the mountains in Thailand. Meaning my cost of living is 10 times lower than in the US and I pay a substantially lower amount of taxes