Duplex in Newark, NJ

[Saif Mohamed]

I'm looking at duplex in Newark, NJ. Purchase Price is $320k, combined rent is $3,170, assuming 8% vacancy, 5% capex, and $50/month for maintenance Managing the property myself. Cash on Cash comes out to 9.9%. Property is newly renovated. Are my capex and maintanenace assumptions too low? Also, is 9.9% cash on cash too low? Ideally i would like to get 12%+ but even this 9.9% deal was hard to find.