The negative cash flow of your RE gives me no concern.  

If your concern is liability, what I did was get an umbrella insurance policy on the properties I house hacked under my name.

. :)As I comp my 3/2.5 primary residence on FurnishedFinder and Airbnb, I saw a lot of availability around White Rock Lake, which does concern me somewhat as I would need to cover the first mortgage with rental income.  

Land trusts can be an ideal choice in Florida, especially when working to shield properties and address Due on Sale (DOS) clause concerns effectively.

It's a good concern.

It's also better for the occupants' health. 

I am also concerned about possible mold in the basement.What should I do?

There are good selections of rugs that you can wash to place under the bed for warmth if that is your main concern. 

@Garrett Brown you’ve got a lot of options, but it sounds like cash flow is a top concern.

I would be less concerned about trying to pick land based on future appreciation & selling.