However, after many discussions with my mentor, I decided to pursue that avenue of investment at a later date.

With regards to actual demand vs ‘implied demand’, the demand for our fourplexes is actually very high.

Yes Ive done a free months rent is lease signed by X date before

You can read about the differences here: Cost Segregation Study Approaches ExplainedLet’s first start with what the approaches:Detailed Engineering Approach from Actual Cost RecordsDetailed Engineering Cost Estimate ApproachSurvey or Letter ApproachResidual Estimation ApproachSampling or Modeling Approach"Rule of Thumb" ApproachSo which of these approaches is required by the IRS?

IE rent to a tenant for >12 mo,  dating before marriage, no late payments then with a down paymetn (long story here)  I'll sell on either a contract for deed (typically mobile homes on land) or a note and mortgage (regular nicer houses). 

.- We also negotiate a reasonable completion date, depending on the Scope Of Work (SOW). --- Who gets all the phone calls and wastes time calming a tenant down because the owner's contractor doesn't show up as scheduled after they took time off from work or a 3 day job takes 3 weeks?

These will also have different mature/resell dates. 

I have actually cashed out a lot of my IRA now bc I have so much depreciation from RE that my tax bracket is very low and the taxes to pay on the IRA withdrawal are also pretty much non existent (taking aside the penalty). 

Finally, the data they are using to demonstrate the price hike is WAY out-dated.

The notice should include the date of termination and the reason for ending the agreement.