I don't see any need to "finally" anything. I have done a number of start-ups, enough to retire on though none spectacular, and probably fewer than you depending on how one counts them.
I am doing a PhD part time, and running a few local groups (including the local inventors' club), and keeping some powder dry, ie time and cash on hand and networking, so that if another opportunity arises then I can follow it.
I love the idea of keeping some powder dry — I think that’s a mindset I need to internalize more: pacing myself, staying sharp, and being ready when the right opportunity comes. But at the same time, I'm getting tired, failure after failure and words from my relatives and even from my wife. It's getting super hard. Still I want to move forward.
I am doing a PhD part time, and running a few local groups (including the local inventors' club), and keeping some powder dry, ie time and cash on hand and networking, so that if another opportunity arises then I can follow it.