I lived at home until I got married at 27. Best decision I ever made.
I think I can summarize it as: it's never been ideal, but we always made it work, and I'm the kind of guy who likes to remember there are always much worse problems elsewhere in the world. if the worst problem I had to solve was not enough privacy with my gf/wife, then I was doing pretty good on a global scale.
I share the same attitude and it’s served me well - you never know when life will hand you a bad card. Our 19 month old son at the time (6 years ago) got sick - he developed type 1 diabetes. It wasn’t easy to accept but then you look at the kids with more serious conditions in the waiting room at the pediatric endocrinologist’s office and realize that type 1 diabetes is manageable. Don’t get me wrong, it’s a disease that never takes a break. In 6 years we’ve probably left him in the care of someone else (my parents) maybe a handful of times because he can’t self manage yet. But we make the best of it. Yes it would be nice to be able to go on date nights once in a while, but the times we’ve tried usually ended in multiple phone calls or constant texting. In the end it just means we spend more time with our kids. Someday they’ll move out/away and we’ll have more time alone than we like.
I don’t think I’d change a thing in hindsight.
For a lot of dating, you are not at home anyway, we used to go to parks, concerts and such to spend time together.
I would think you can pay that loan off in a couple years working in SV. But with all the talk of forgiveness maybe you should hold off a bit...
Of course, it must be said that one doesn't get a PhD because it's the financially smart choice.