Please study engineering and you’ll have more of a grasp of why measuring amperes (electricity) or volume (water or natural gas) lends itself to reasonable precision.  

Print them off, study them, highlight them, make notes, read some blog posts, and understand the subject.The second document he links includes precise definitions and a guide for landlords to use for screening support animals.

Studying for and receiving the CCIM designation will be a solid plus.  

Due Diligence and Feasibility Studies - What studies or tests are essential before purchasing raw land?

Financing is definitely an area that I will need more study.

Quote from @Jamie Hora: The question you pose in the title, "Is a rezone required if availability study can support more density". 

Then I wait for their responses and see their body language. 

Quote from @Melanie Baldridge: A question that we get:"Does the IRS require site visits for cost segregation studies?"

We have seen properties for as low as $100k benefit from engineered cost segregation studies. 

And becoming a first time investor in a country they don't live in and they don't speak the language will be interesting for them.