I've seen cases where the warm moist air condensed on the underside of the roof sheathing and rotted it and the rafters.

v=vMq3ux6g4zEBut to be sure, not all dogs bark all day, (some do), and their owners can work with them to stop it--but it's a PITA that doesn't happen with cats. ...until you get a renter who's cat(s) urinate all over the place and you end up having to do some serious remediation just to get the air quality, among other things, back to normal. 

A responsible landlord will fix a water leak quickly to protect both their asset and the health of their residents.An air quality test is usually a better indicator of any health risks related to mold. 

Purchased as a index against inflation + potential for a air bnb long term.

Not concerned at all, as in this case what Wall St thinks of Air's future will not affect my STRs at all.

If a tenant's air conditioning goes out in July, are you going to wait to file a claim, get it approved and then fix it?

I want to see if there are any unreported leaks, change the air filters, make sure there is a fire extinguisher, check the smoke detectors, and see what's going on in the unit.  

@Michael Coritz I'm SW with the Air Force and my partner is an ex UH-60 driver, collectively we have over 20 years of service and both retired early through the power of real estate. we don't have connections in south Texas but I want to offer you encouragement. 

I would not flip homes, I would not do short-term rentals, I would not do Air BnB.

The positive here is that the windows, air and furnace are updated.