Hey, I started out an air bnb rental recently in Round Rock area in TX.

Purchase price: $160,000 Cash invested: $3,600 Duplex in Ligonier, one side is long term, other side is Air BNB.

Was told that it was a more effective/long lasting option for a crawl space where over time the fiberglass insulation would fall/still have space for air to travel through. 

Quote from @Troy Froistad: Don't leave it in the air.

In fact, we know of a case where a tenant complained of mold and there turned out to be higher levels of mold in the air OUTSIDE the house, than in it - since the house was next to a swamp.

It cost me $4800 to get rid of the smell (replaced all blinds, painted the whole house, air duct cleaning) while their deposit was only $2300 so they still owe me $2500. 

Do you have a boiler or forced air heat?

On the rare chance it goes sideways and the guest tries to tangle you back in with the booking platform for the guests gain or leverage, is this booking worth maybe getting banned from Air or VRBO?

Airport Air Navigation Easement will tell you you are in the flight path.

If so there could be some structural issues.I always keep my eye out for window AC units- then their either isn't central air or it isn't performing well.