The best place to start is with a spreadsheet that has every every cost itemized. 

Way too many moving parts to predict it and the bull is in the China shop right now breaking things. 

I was looking into bank stamens loans as well but I'm not sure if that would be the best option for us currently.

You need some way to jack up this rent.

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).

I would say your best bet for your best rates and best payments would be a residential mortgage company.

Can you share the websites you use and other ways of finding properties to buy?

@Evan Thomas AndriolaDepends on the proeprty/tenant Class.Class A: we usually recommend newer/nice appliancesClass B: we recommend used appliances because tenants don't take the best care of them.Class C/D: we do NOT recommend appliances because tenants don't clean, leading to so much caked on food/grease it's realistically not cleanable.

2- if there is a “problem” Will the “solution” discussed solve it in a cost effective, consumer accepted way?

Wishing you the best on your journey!