And from what i've gathered through reading the text messages and emails the tenant had sent to my parents, the tenant really did just install the AC without notifying us. and true, I don't know the extent of their business relationship, but it looks very professional and healthy to me. 

Should gain a healthy amount of equity in that time with the market and paying down.

I think you're right and proposing a healthy mindset.

I have 3 healthy STRs in a popular lake community that draws about 6M visitors per year.

They are similar in that they are both in the sunbelt, diversified economies, favorable landlord/tenant laws (GA is better for foreclosures), and healthy population growth. 

The structure is technically able to be moved by a simple disassembly process and the installation can be completed in as little as 4 days with the installation crew.Some of the key details are that our materials are sustainable, recyclable, healthy, use building science, and our exterior panels sequester carbon instead of producing it like traditional concrete.

Or is there a healthy balance of 50/50?

And by buying right, my rents more than pay for the mortgage, so there is room there for adjustment and still remain healthy. 

So, expect that going into any loan situation, but don't over-estimate the impact of this on your credit when it happens alongside otherwise healthy, wise financial behavior.

Definitely an outdoor paradise with a strong emphasis on healthy outdoor activities, plenty to see and do, all the amenities you need without being in a crowded place.