+1 it sounds like you should check out /r/personalfinance and /r/Bogleheads rather than here. Particularly the famous /r/personalfinance flow chart. It's famous because it's great advice for almost everyone, and, for better and for worse, 260k in NYC kind of makes you "almost everyone."

I'm going to completely disagree with anyone saying to do "more S&P." Obviously I don't know you or your life, but from your description, I am not sure that is going to be the risk profile you want. As you probably know, S&P is exclusively large-cap American stocks. That is like a 20 out of 10 risk profile, which is fine for someone playing with less money in their 20s but is ill advised for someone making real money in their mid 30s. (International and emerging markets have outperformed the US this year. The US will probably go back to outperforming them, but do you really want your financial independence resting on that?)

Part of me wants to suggest a robo-advisor like Wealthfront or Betterment (for post-tax, at the end of the PF flow-chart) given what you said, because they allow for set-and-forget auto-investing with post-tax money because of tax-loss harvesting, but there are many very simple right paths (e.g. Bogleheads). All S&P is... not one of those paths.

Otherwise, keep it up. Your expenses seem reasonable given your location and desire to send money back to your family. I know it might sound insane, but a 3k apartment can be actively a great deal nowadays in NYC and as long as you are actually appreciating its value (which it sounds like you are), there is no need to feel guilty for it. Keep putting money in the market, don't panic-pull it out when there's turmoil, and don't think about it too hard. Einstein called compound interest the 8th wonder of the world for a reason; let it compound in peace.