It depends what the math says keep in mind that on air bnb you will have significantly higher management costs and you will have cleaning costs that would not be present in a traditional rental.

The map suggests that there are no issues with the location either (train tracks, air strips, busy roads, etc).Conventional wisdom says that leaves three possibilities:1.

I've even thought about getting a SF and possibly air bnbing the rooms out as well. 

Two of my vents arent getting air pushed through them from the AC unit (7 other vents are working fine and receiving air and the AC system works fine).

With the windows open, it helps circulate air more of course but doesn't do much of anything for the humidity levels.

Check air rights and density.

Cheers,Daveyou will pay big money but a licensed air bnb in Charleston will beat any rental anywhere in the US hands down. 

Air Flow - There is a window in the room and I have been advised that an AC unit can be added to this to keep the room cool2.

It is very common to see automotive, gas stations, and dry cleaners that have environmental issues which can get expensive beyond belief.If you want to do whats called a desktop review or RSRA report to see what kind of environmental issues the property may have please let me know.

Propane burns cleaner and usually the annual service is cheaper and easier....although not always.