It's possible for a solo developer to build a profitable microstartup to pay the bills and live life on their own terms!
Microfounder is someone who builds and runs a small profitable internet startup as a solo developer.
I publish monthly revenue for every microstartup listed. The revenue data comes directly from my conversations with the founders or from the public sources (their Open Startup page, Twitter, etc). Some of the revenue is verified by Stripe, some not. I'm planning to add more functionality around revenue in the future (verification, monthly charts, etc).