I'm just on the other side of 40 and have similar developer vs manager pains as you. Had my own bootstrapped company for several years, sold it, and lately have

I'm just on the other side of 40 and have similar developer vs manager pains as you. Had my own bootstrapped company for several years, sold it, and lately have been working as an engineering manager at a startup. Its nice not having the normal worries of a founder but I already have the itch to do something again. Problem is, I never have luck when I go out looking for an idea. The idea usually finds you. You just need to make more opportunities for serendipity. Also, don't think you have to found a company AND raise money.