He mentioned that an air purifier would help with allergies.   

and need either a 2 unit (or more) property or a small property great for short term rental such as air b&b rentals at the beach.  

I'm worried that this ceiling contains asbestos and that they may have been disturbed and are now in the air of that unit.

Got married had a baby then air bnb on 1 floor and rented the other.

My potential tenants usually have bad credit, work minimum jobs or cash jobs and don't meet the income requirement but will complain about the unit not having an island, or no central air/garage, or a neon green bath tub (everything else was remodeled).  

I have owned a few homes in my travels while serving in the US Air Force.

You would lose a lot of heat to the ambient air. 

We hope it's just ghosting from the air, humidity, and or lack of insulation.

The biggest question still up in the air is: Do you have to hold a single property in an OZ via an Opportunity Fund for 10 years to receive 100% deferred capital gains on appreciation, OR can you essentially 1031 exchange every 2-3 years across multiple opportunity zones and still get the 100% deferred capital gains.

Now he is recommending that we also air test the rest of the house.