How do I analyze my primary residence?

[Justin Johnson]

I'm looking at a 3 flat right now and one unit I will live in and the other units I will rent out. This isn't a house hack situation where I'm going to rehab and then flip. I plan to live there for the long haul and it's turnkey, but I want to be smart about the investment. 

Any insights or tips on how to look at the numbers? I'm a PRO member so I can use the BP calculators. 

Thanks in advance