[alain94040]

After 4 years of $0, I'm not sure it's a matter of finding the strength to keep going. Something in your target market doesn't seem to be working out.

If you can, find experienced friends that are willing to tell you the ugly truth about your business effort. Talk more to your potential customers. Did you just happen to pick the wrong market?

[riku_iki]

I think all markets are currently saturated. What market do you think is easily available for solo hustlers?

[lmiller1990]

There isn't any easy markets, making even a few hundred bucks a month as a solo dev is vastly harder than just working a 9-5.