An ounce of prevention is worth a pound of cure. 

Desperate sellers may have been adjusting prices more aggressively, but I don't think this is happening widely yet.By the way, the Bank of Spain (BoS) has officially requested surveyors to adjust their valuations down on a preventive 10%.

Goettl wants $933 for a duct cleaning and $1,685 for the installation of an electronic air cleaner to give our tenants the best air quality.

In West Ashley, I'd much prefer to find a multi family or a flip opportunity in like Air Harbor, West Oak Forrest, or Windermere than a SFD buy and hold.

Given  that information, you can apply your particular loan scenario and then stress test it thoroughly - hurricane, no snow, pandemic, Air BNB ban, ect, ect. 

No different than renting out an Air BnB right?

Costs soooo much more than it prevents. 

Air DNA is charging me $300 ( a whole year) just for the 1 analysis in the neighborhood that I want to look at to possibly purchase a property in. 

If it’s a full gut, then it would behoove you to do a traditional forced air system. 

For the next five years I always replaced them with a central system heat and air.