All four units are identical, and according to my research should rent for between $725-750 per month.

FIRST establish your investor identity; what type of deals do you want to get involved in (flips, wholesales, buy & hold, rent to own, etc), what type of property do you want to invest in (single family homes, multi family, commercial, etc), what's your risk tolerance, what sort of returns do you expect to get, do you want to be hands on or make it as passive as possible, etc.SECOND pick a strong market based on it's ability to meet your investor identity and based on strong fundamentals like I mentioned above.THIRD put together your team in that market.

Before the auction, I knew the property was occupied but I didn't know the identities of the occupants.

She already has a over the toilet storage unit for those wondering, almost identical to the one @Joe Splitrock posted.

I'm in a near identical situation with a landlord who doesn't care to correct.

You can also verify the chain of title and identity of the current owner. 

As we use the identical paint each time, same make, color, finish and even product, then we get an instant match.

My basic understanding is that you charge the tenants each month based on the ratio of their unit's square footage to the total square footage of the property.I would give credit to the BP member who I saw this from but I can't remember.For an easy example, consider a tirplex with identically sized units.

Because of the affordability/utility factor, for units that are otherwise identical, SEC 8 will pay the most rent in an apartment with shared walls and the least rent in a single family home with all walls exposed.

Also, being extremely diligent about screening them and checking their stated (and maybe unstated) prior landlord references is key to getting a good tenant.Have them fax or email you a copy of their ID and other supporting documents to ensure their identity before running background on them though.