Though with Zika it’s an extended period measured in months it’s still ok for young people like healthy children to visit affected areas with no concern it will affect their future children. 

I recall the added cost was around $2.50-$3 sq ft for the additional soundproofing measures.

We base our decisions measured against that $60,000. 

In terms of those that appear on the property after closing is there a way moving forward that I can take precautionary measures? 

What type of soundproofing measures did you implement?

I like the area very much but true performance is what needs to be measured and it's fair for the state of economy. 

Before I started with my STR, I heard someone say you have to be more tolerable of a spreadsheet that isn’t perfect, and not every number/measurable is going to run perfectly from month to month.

House 1 CoC = 4.8% House 2 CoC = 3.84%My suggestion would be to look at your CoC return when comparing different properties so you have a good measuring stick to judge properties with different prices. 

Closing details are important to measure my key performance indicators.

These percentages tell you nothing of value, and most of the time will lie to you anyway.Build yourself a financial REI plan, based on a set of specific financial goals (not percentages), ...something that is measurable and means something.Now before someone writes that these percentages are just guidelines, and not actually rules, my answer to that is "why bother with them then".