I don't know what the ratio is, I'm just pulling that number out of thin air.

I've seen plenty of people add small kitchens for Air BnBs so I assume it is.

That's what I think a fair price is.It does depend on how far it is to the roofing supply store, how far it is for the workers to travel, if there's any rotting wood that needs to be replaced and how busy they are (busier = higher profit).You could buy a couple ladders, a compressor, a 100ft extension cord (14/3), 50 ft of rubber air hose, a roofing nail gun, a caulk tube a couple shingle removers and pick up some day laborers who know how to roof. 

I joined as a renter to check it out it and saw a property from American homes 4 rent, it seems similar to hotels and air bnb.

It was an out of state investor that wanted the property to list as an Air BnB.

The water is always cold, but at least in the summer it is nice outside of the water and the winter air temps are probably higher than the Tahoe winter air temps. 

That will kill what is on the surface and having it damp will reduce what gets in the air while you remove the drywall (with proper protection-completely suited up). 

I’m active duty Air Force as well with four properties.

I am a realtor in Kissimmee Florida area trying to help a friend of mine get into rental arbitrage for Air BNB.

I could also Airbnb it as an eco house as I will make sure air quality is optimal and buy organic mattresses but I'm not sure if Hagerstown would be a potential vacation destination.