while I totally understand the frustration especially purchasing what was supposed to be a new and ready to go asset, but these things are pretty common so don't feel to discouraged. 

Spacious common areas and a quiet neighborhood.I’m drawn to this tenant group because traveling nurses often make great renters—employed, responsible, and in need of temporary housing.

Common deductible expenses include mortgage interest, property management fees, repairs, and even travel expenses related to property management.

@Jonathan SmallThese are just general and common knowledge about Florida known to most. 

He said that the insurance company gave him a discount because the materials are less susceptible to fire than common materials used like asphalt shingles and stucco.  

These are professionals with additional training and a stricter code of ethics.

I was fine with all these numbers.Then I met with contractors...First, I wanted to add a new bathroom and approximately 450 sq ft of additional living space.

Would be great to reconfigure the lot lines on the two additional parcels so they'd both meet the minimum to build.

In most single family zoned areas adding a single ADU is not a value add meaning it will not add more value than the hands off cost of the addition.  

After that's under control, focus on increasing income through additional work at your current job, taking on a side hustle, or finding ways to increase income on your existing rental.At the same time, educate yourself.