One effective strategy to maximize unit potential is to explore opportunities for adding extra units, especially in C-Class properties.

I will be quick to admit I have only had experiences with small rentals (6 units and smaller) so if you are looking for help on larger apartment complexes I would not be a great resource.

We have a pretty good Tenant who is moving from one apartment unit to another.

The second case was a commercial property (an 8 unit multifamily in a complex of 6 individual 8 unit buildings), owned by a group of investors.

How many units are you looking to obtain? 

That said you can greatly alleviate that with good screening, and the higher price point that these types of units can demand should help filter out the deadbeats.

Due to a very high entry level in my home state (Long Island, New York), I have turned to look at out of state markets, particularly Augusta, Georgia. 

It is a Duplex which is currently occupied (both units).

My mom lives in a nice house that she has paid off. However to save money when she had the house built, she left the basement unfinished--it is just studs, insulation, and windows/doors, plus plumbing in the foundatio...

So if you're not raising rents to at least $2700-$2800 if the value of the units are truly at $3000, then why get a tiny house.