The problem as I see it is there are too many variables to quantify in an interview.

For a BRRRR Long term appreciation should be a secondary or last plus point, it’s also impossible to quantify.   

And appreciation cannot be quantified. 

I plan to do some data analysis on the area to better quantify this.As a wholesaler, how can I best present rehab costs to buyers?

In what ways do you personally quantify the division between these neighborhood types? 

And our interest is in merely trying to quantify and qualify the home for you.If you have the home inspection in hand it's a spec sheet that you can shop around and get bids on, use to intimidate  Negotiate with the seller, offer to rehabbers (as a wholesaler) all without exposing you to any more liability, or stress, or awkward situations outside of the normal real estate purchasing process.And finally to address your last point, I know a couple Home Inspectors, and they do their own flips, also most come from a construction/architecture background so to say they don't know as much as a contractor is silly.  

In fact, the nice thing about numbers is that we can quantify the difference in risk.

I need to quantify what those items are and how much of a risk it is...

I think the point is being missed...it's not that a Spreadsheet is bad in an of itself, it's the fact that many people don't understand the inputs, results and the whys behind it for the most part, You can make a spreadsheet read whatever you want to directly or indirectly.I'd be much more attuned to those like @Triston Murray who understood or figured out the whys and whats and then assembled a spreadsheet to help him quantify his analysis vs using a pre-formatted fancy spreadsheet and know nothing about the whys or whats.

In real estate, it is not easy to quantify, and why I pretty much defer to reading the thoughts of those far more knowledgeable than I (i.e., many contributors to this thread) as to where I perceive we are now.I do believe that fundamentals are misleading when trying to value an investment during the mid stages of a 'boom' cycle.