Your lender has no bearing on your ability to raise rent.  

—In all criminal cases, contempt cases, and other cases filed pursuant to this chapter, if a party has sold, leased, or let real estate, the title to which was not in the party when it was offered for sale, lease, or letting, or such party has maintained an office bearing signs that real estate is for sale, lease, or rental thereat, or has advertised real estate for sale, lease, or rental, generally, or describing property, the title to which was not in such party at the time, it shall be a presumption that such party was acting or attempting to act as a real estate broker, and the burden of proof shall be upon him or her to show that he or she was not acting or attempting to act as a broker or sales associate.

There are a couple of moving parts so please bear with me. 1st, I have poor credit.

I believe that prices are going to continue to go up and, at some point, we're going to see another mini bubble period until new construction can get back on track.You simply can't continue to provide housing for people when there is so little new construction going on when compared to what a normal market should bear. 

I would also, like you said, raise the rents on the unit(s) that are not occupied if the market can bear it and/or get the purchase price down to say $50k or less, this would make for a wonderful cashflow property. 

The forbearance is non interest bearing but becomes due at the end of the loan or any sale. 

If it's higher than what the market will bear you will get more traffic.

Bear in mind, I know nothing about your market from an STR or even long term rental perspective but my knee jerk reaction to your question is to just sell and move on.  

Bearing that in mind, the cash flow numbers above are before any costs (repairs, vacancy, Cap X, etc.)Also, the neighborhood is LoDo.

I was using Google Earth to get my bearings on where each was and what they looked like, and not many were really that great to be honest.