I'm just curious, why are you investing in Irvington? I assume you know the market well if you're from Newark but again I'll ask, why? It is literally a class D neighborhood. Drug dealers, shootings, etc. If you want to invest in low income, go to Passaic. Still class C but way less drugs and violent crime. I'd say Paterson is better than Irvington but not by much, only by shooting numbers. Less police involved shootings too. Irvington is also Essex county which leans hard to tenants rights. At least Passaic and even Hackensack (bit more $ than Passaic but still a few class C areas left) are not as tenant friendly as compared to Essex county.
I don't get people investing in the literal hood instead of parts of Passaic and Newark (very specific parts) that are rough but more working class. Good luck on that eviction, I know a good eviction attorney if you need one. Actually I wouldn't do Newark either due to their nutty rent control laws.
Clifton is good as you can find cheaper, more working class as well and still in Passaic county. Orange and East Orange are probably tempting as they're cheap but again, bordering Class D with crime and drugs. Plus it's Essex being more pro tenant.