I see the same positives you've mentioned in this thread, and I'm pretty sure I'm doing diligence on the same duplex you mentioned due to the seller financing option on it.

I guess my main concern is the rising interest rates we'll be seeing soon if things keep going the way they are, so I'm wondering about locking down a couple more cashflowing properties.I know it depends on individual goals, but I guess I'm wondering what you guys would do if in the same position.

There is certainly something positive to say about diversification.

We have always felt positive about Trenton, and the direction it is moving in. 

Also, your credit history, the claim history of that property, your own credit history could potentially negatively affect the rates (also could be positive factors).  

Another thing you can do is to demand first position on DD order.

Refinancing could be an option, but I don't want to end up in a position where the increase in P&I payments would negate any Rental NOI.

You would most likely be required to put a minimum 25% down and the value of that equity would kill any possibility of ever having positive cash flow.

I haven't used them yet, but I've heard positive feedback from others.  

You put yourself in a position where you look like a servant to your tenant.