I'm in my late 20s and my wife works on her own startup (non tech tangible product). I wonder if there are others who have their spouses working and how the mar

I'm in my late 20s and my wife works on her own startup (non tech tangible product). I wonder if there are others who have their spouses working and how the marriage factored into their decision to pursue a CS PhD. I'm not from USA. My primary concerns are her startup tanking, me being unavailable for her mental health and of course a steady income. I sometimes wonder maybe I should pursue a CS PhD after settling down financially by late 40s.