Also the basement is an air bnb. 

If you allow pets, ensure your outside air conditioner condenser(s) are fenced to keep from the pets peeing onto them.

@Marty SummersI don't see any problem with it if they are paying the bill and as long as the air conditioner is connected to the electric outlet with the correct amperage able to handle the load.

My last Air-B&B was great.

Who needs to turn up the air when you leave when it's free?!  

I researched our area using Air DNA and it seems like the asset would do well assuming we can keep it booked at a decent rate.

So, they will at least need to be extra careful when doing the laundry, they will touch the same handrails and steps, breathe the same air.

I read a passage from the book How to be a Capitalist without any Capital written by Nathan Latka.

One of which would be carbon pleated air filters.

I would wait until the next rental group to be in before making larger changes like that unless it's just added a condenser to put in Central Air bc Central Heat is already in place and you need the tax deductions.