Building a SaaS boilerplate solo taught valuable lessons in entrepreneurship, burnout, and reality of solo development.Lesson #1: Perfection hinders progress, MVPs are crucial, real user feedback drives improvements.Lesson #2: Marketing is vital; focusing solely on coding without adequate marketing leads to low traction.Lesson #3: Solo work blur lines between work and personal life, setting boundaries is essential to prevent burnout.Lesson #4: Embrace controlled chaos, time-blocking helps manage various tasks efficiently.Lesson #5: Documenting code and processes is crucial for future reference and understanding.Lesson #6: Pricing strategy should focus on value proposition rather than mathematical calculations.Lesson #7: Having financial runway is key, allowing focus on meaningful development without monetary stress.Lesson #8: Choose tools you enjoy using to maintain momentum and prevent burnout from technical challenges.Lesson #9: Online feedback may vary, remember supportive voices exist amidst criticism.Solo SaaS building is challenging but rewarding with autonomy, creativity, and direct impact on results.