Beginner Investing in First Multi-Unit

[Mitch Pascarella]

Good morning all,

I am relatively new at real estate investing. For some time, I've been reading & watching BP podcasts regarding rentals. I feel that I've done most of the ground work, minus actually buying a property. My goal is to make my first investment at the beginning of 2020, but I am in need of some guidance from you all. Recently I had found a duplex near my house that is currently fully rented. I'd like to get some input on the numbers I worked together below: 

Purchase Price (assumed) - $61,000 

Down Payment - 20% 

• Monthly Total Rental - $1,200
• Mortgage - $227
• Tax - $110
• Ins. - $75
• Vacancy (7%) - $84
• Repairs (5%) - $60
• Cash Flow - $644

Cash on Cash: ~55% assuming additional cash for fees 

NOI - $787

Cap Rate - 15.4%

Thoughts? To my eye, it seems like a deal that I would benefit from, but I am concerned about an unaccounted calculation on my part. I'd like to add that I am from the Pittsburgh area. 

Thank you.