Loss of reputation plus down deposit/earnest money to start.I suggest concentrating on one solid deal if that is all you can technically afford at this time.

When looking into multi family properties what are the main indicators I should be concentrating on to know if it’s a good deal?

Otherwise, the rent is always paid (no parent wants their kid and them dinged with eviction & non-pay) and if you screen well enough and try to concentrate on senior-level students & graduate students, you usually avoid the worst stuff (hint: freshman are the worst to rent to!).

until you concentrate in Mammalogy, Botany, Herpetology, or even further down into molecular biology or organic chemistry, but you have to start somewhere.   

Figure out what the best use of your time is, and concentrate on that.

We still own a couple properties in IL but our portfolio is mostly concentrated in southern states. 

What I know about Buffalo is that besides Detroit it has the highest concentration of vacant properties in the country.

Interesting question....not positive, but I suspect the higher rental concentrations are areas, naturally, of more multi family properties.....those with lower concentrations are likely more single family.

I am currently concentrating on north warren, sterling heights, Clinton Twp, Fraser.  

I'd recommend you concentrate on evaluation properties and seeing what fits your investing goals.