From there, you can start comparing markets based on profitability, demand, and distance.

Based upon this fact pattern, do we qualify for Real Estate Professional status?

If you don't have a US-based bank account, I would get one as that's a requirement by most lenders.

The best way to gauge value is to do it yourself based on reviewing comps taht were sold and condition and come up with your own number is what I have found. 

Essentially its not a calculator since it is speculative, however based on "comps."

We wants to rip out a perfect pre-fab shower enclosure to put in a custom tile enclosure.  

Is my CoC return solid, or do I need to adjust anything based on my market?

I am based in the Athens, GA area, passionate about building a sustainable income through real estate ventures.

I see you're based in Long Beach, CA. 

An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provide support for the property tax appeals process.