I am/was in a similar situation where I really wanted to start something on the side. I spent 6-mo trying out new ideas and experienced all the same problems you did (i.e., tired after work, can't devote enough time to build the product, sucked at marketing, etc).
After 2 years, I finally have a nice SaaS business that's giving me some passive income. What did it for me was that I created a solution that solved MY problem. If you're trying to solve your own problem, turns out you'll spend time on it and most likely many other people have the same problem.
My side project keeps me a bit busy (usually 5-10 hrs a week) but it's really not bad considering that I'm saving time by solving a problem I had.
Just my two cents, as it seems that coming up with the right idea is half the battle.
After 2 years, I finally have a nice SaaS business that's giving me some passive income. What did it for me was that I created a solution that solved MY problem. If you're trying to solve your own problem, turns out you'll spend time on it and most likely many other people have the same problem.
My side project keeps me a bit busy (usually 5-10 hrs a week) but it's really not bad considering that I'm saving time by solving a problem I had.
Just my two cents, as it seems that coming up with the right idea is half the battle.