I want to know if this is the right methodology b/c if it isn't I don't want to waste my time doing the wrong thing. 

It's the same house, so a reasonable normative argument about what "should" happen could be made.But the thing will be being evaluated using a different rubric, a different methodological approach, different "grading criteria," so it's likely going to get a different "grade" one way or another. 

Another item that is seldom discussed is the methodology behind population growth rates.

It includes, among other things, a comprehensive map of the Cleveland area, grading each area from A+ down to F, using a consistent, objective and transparent methodology using publicly available data. 

No way I'm paying thousands for couple leads generated by some gurus with no guarantee I'll pay the garbage man and mail man for lists or give them a 1-2k check if I close on a house they brought me before I ever pay a guru thousands for a few leads 90% of the leads are garbage, 90% of the leftovers won't closeI'd pay for the systems and methodology before anything else.

Anything short of that requires a foreclosure sale on the courthouse steps (Or whatever methodology that local jurisdiction employs) in order for the lender to gain ownership.

The IRS's preferred methodology is engineering-based studies which help you, your tax professional and the IRS going forward.

As you know, the IRS Cost Segregation Audit Techniques Guide provides information regarding the specialization, methodologies, and frameworks one Cost Segregation Preparer should have in order to provide an accurate qualified study.  

GTD calls that a weekly review where you edit your task lists, project lists, and review your goals and vision plan to begin new projects that help further your goals towards your vision.Anyway.

The good news is appraisers use a very standardized methodology, and there's no reason to think you're going to get a value that's way out in left field.