Ongoing costs that I am not being told?

In my opinion, this is one of your best bets compared to single family or condo rentals because in the case of non-payment, you still have the income from at least one other unit to cover ongoing expenses.

So I ran numbers on several scenarios: keeping the condition and rents the same, doing a medium renovation and fetching maybe $1150/unit, or doing a complete renovation and fetching up to $1400/unit. 

It's important to remember that commissions don't go 100% to the agent as the brokerage firm gets a portion, there's franchise fees for using the brokerage name, potentially local taxes, ongoing expenses for realtors, federal taxes, etc.

I ran through a few different ones that I thought of, but nothing really stuck.

You will want to have your financials prepared for the prior 3 years, to include proof of all your ongoing expenses, the capital improvements you have made, and a narrative that shows where the potential upside exists. 

We are planning on going to view it formally tomorrow.

I ran the numbers and it would be a home run.

Just something I ran across and asked myself what could be done with it. 

Still ongoing. 3 more years until the refi.