buy and hold for first time buyers

[Michael Pacheco]

hi everyone!! first time on this forum.  My future wife and I are looking into real estate investing. But I had a question about buying and holding a multi family property.  Im trying to run the numbers but im coming up with a problem.  how do I calculate if its a good investment when we are trying to buy a duplex, while living in one unit and renting out the other unit.  What numbers are good (noi, cash flow, etc.) to move forward on a property. if anyone can help it would be greatly appreciated. 

Thank you

Michael and Jamesina