@Nick Louie I'm curious, what was your impression when you went and walked the streets for the first time?
I lived in the Bronx as a middle school student in the 1990s, a much more dangerous time than now, and I turned out fine. There may have been an increase in crime in the past year or two, but it's likely temporary. If you plan to hold on to this property long-term, think of the fundamentals:
1) Transportation - being near a transit hub is incredibly valuable. Even though with COVID many people are avoiding public transit, the ridership will come back, and New Yorkers pay more rent for being near transit, so you'll always have your choice of tenants. Just screen them properly.
2) Path of progress - so many NYC neighborhoods have gentrified, with the Bronx being essentially the "last frontier" of affordability, things should only get better. Progress is not inevitable - obviously, in the 1960's/70's/80's the Bronx went from being more middle class to falling on hard times due to white flight, highway building, disinvestment, the crack epidemic, etc. But I think that's all behind us now and in the long run the city will continue to hold itself together and grow.
3) Inflation and equity paydown - don't think of cashflow alone. As we hear on BP podcasts over and over again, real estate is a "get rich slow" game. Any reasonable property in a non-marginal neighborhood makes sense as an investment, over time. And if you're only going to live in it for one year, anyway, you're not taking on much personal risk, your tenants are.