I'm just trying to see if it's possible to put together a profile on certain attributes that stand out for individuals that sell their homes to wholesalers.

How will you find that individual?

@Crystal Smith HUD properties will indicate whether it is owner occupied or all bidders allowed.

The buildings are on separate parcels and lender is willing to do individual 30 year fixed on each one or portfolio loan with 3/1 Arm amoritized over 30 years, both interest rates are just below 4%. 

A quick google search indicates that there may not be a limit to how much I can increase the rent:(50 ILCS 825/5)Sec. 5.

You might expect to drop $2000, 6 months and have to offer decent argument that a duplex rezone is consistent with the neighborhood plan or that there's a new community need to increase the density.  6,050 indicates it's a legal, non-conforming (undersized) lot - it still meets the minimum lot area for TU but do you have 50' of frontage?

Are there any value add opportunities such as individually metering each unit, for water and/ or electricity, so the tenants pay these expenses and not the landlord, or is the property already individually metered?

Everyone was already planning on putting down 15-20% when financing their individual purchase.  

Very often, a population decline that is not followed by another economic indicator is worthless.  

I believe me stating in the post "it's perfect for college students" is not necessarily an indication of preference, but merely an observation based on one individuals opinion.