Have a frank conversation with the property manager. 

Account ClosedAdding your property manager as "additional insured" is standard practice and beneficial for you.

I reached out to the agent representing the property to see if the owner might consider selling.

It's that she doesn't want to let the house go, and I thought it could learn from this property without having to buy property.

Mitch,It sounds like you've had a successful run with your rental properties in College Station/Bryan - I'm impressed!

Quote from @Fernando Martin-Gullans: Hey y’all, I’m a retail investor with 2 SFH rentals worth a combined ~$650k looking to utilize some of my stored equity to buy more out-of-state properties, but I’m not quite sure how best to proceed given that my interest rates are incredibly low (leaning me away from refinancing) and neither property is owner-occupied (which I believe prevents me from using a HELOC).

BP has built a great selection, all of them worth reading and that will help you build foundational knowledge.To answer this one: the words from old school investor Dolf De Roos "seldom sell" and you will find a lot of post on BP from people who regret selling properties in the past.

.: I’m currently renovating a rental property and exploring ways to manage costs without compromising on quality.

What other methods should I use to acquire another property? 

Figure out how to actually analyze property and practice.