It may impact someone who already has an existing respiratory issue, but it won't cause illness in a healthy individual.I recommend inspecting the property and determining the source of moisture.

Properties formerly occupied by the owner are always the hardest for us to onboard (We do STR and MTR property management).

I've always been interested in rental property, but I'm nervous to make a commitment that could put my finances on the line.

It's great you want to optimize your property management on your first two, but you should also optimize the properties themselves before looking to buy anything else.

I'm going to purchase my first multi family investment property in Florida. 

Are properties such as this more appealing to buyers with renters already on leases or will I get more interest and a higher sales price if I sell the property vacant?  

A property that is listed on MLS has been conditioned" to sell.

Land doesn’t depreciate, and while buildings require maintenance, they usually gain value as markets grow, demand increases, and inflation takes its toll.Real estate investors benefit from a significant tax write-off based on the concept that properties lose value over time, even as their market value skyrockets.

A huge wasted expense re-titling the property to a new LLC. 

The most I have ever used to buy a property is 10% down.