Just remember that ANY strategy/methodology has a various number of conditions with it and its all predicated on what works for you and your situation. 

I can see things getting pretty crazy after 20 even with GTD systems.

Ie, you don't need us for that.Where we can help is to check your calculations to see if we agree with your methodology.

Today’s Mortgagee Letter includes page revisions to the MAP Guide to reflect the new $120 million threshold and the annual review methodology.

More often you will hear of Market CAP rates which is just an average of CAP rates for recent transactions which may,  or may not,  have been calculated with the same methodology.  

If so, does anyone have a good methodology that would work? 

"On grade" is the typical construction methodology that you are all used to where forms are built for the slab and poured onto the graded dirt pad, this is in contrast to "podium" where the cars park underneath in a concrete garage, and another type is high rise construction.

Could you kindly share your knowledge and recommended methodologies for conducting comprehensive neighborhood analyses?

For those unfamiliar:  WiKiLean Six Sigma is a methodology that relies on a collaborative team effort to improve performance by systematically removing waste;[1] combining lean manufacturing/lean enterprise and Six Sigma to eliminate the eight kinds of waste (muda): Time, Inventory, Motion, Waiting, Over production, Over processing, Defects, and Skills (abbreviated as 'TIMWOODS').

I think a lot of real estate is finding the methodology that works best for your skill sets, goals, and time availability.