Anyway.. carry on I am sure you will figure out what works..

I plan on mailing the letter certified and I wanted to know do landlords also call the tenant as a courtesy to let them know about the letter. 

He sells you his house for his basis $323k carries the note.  

Here is the situation:- I signed a commitment letter that has the incorrect brokerage logo.

I also received a letter from the county saying that my property is in violation of several health and safety codes. 

By the time you factor in insurance and any cap ex....it's already a loser...even if you aren't carrying a mortgage.  

These methods include: Detailed Engineering Cost ApproachDetailed Engineering Cost Estimate ApproachSurvey or Letter ApproachResidual Estimation ApproachSampling or Modeling ApproachExperience or “Rule of Thumb” ApproachIt’s important to understand the differences between the approaches including which one best fits your property and the reliability of each approach.DETAILED ENGINEERING COST APPROACHThis approach compiles the costs from construction and accounting reports to build a report.

Quote from @Jason Baker: I’m A 11th Grader And I’m Committed To Being A Young Real Estate Investor After HighSchool...Just Trying To Seek AdviceThe average person who went to college carries $40,000 in debt. 

Really about growing a strong portfolio of solid deals.Now that being said, if you are a high income earner, well qualified, and can't find reasonably good deals: (i) you can connect with a well connected real estate agent for off-market deals; (ii) you might do a very narrow cost-effective cold call or letter writing.

Especially if you have a denial letter.