Quote from @Matthew Irish-Jones: I have two major issues with Bigger Pockets. 

Rent paid for all of the expenses, so it cost me nothing and over the years (I kept it for ~20 years) price almost tripled by the time I sold it.Not sure what grad program is 3 years (I'm used to 2 for masters, 4 for PhD), but if you do need to sell one, I'd look at each property and see which one has the most equity, highest interest rates, lowest return, major expenses in the near future (eg new roof) and you mentioned you'd lived in two for 2 of the last 5 years, so have capital gains exemptions. 

Number of Major Employers (To try and understand if the local economy is resistant to losing a big employer, or if that would crush the economy)8.

Florida as a state, and many of it's major markets are some of the worst positioned in the country for real estate investors in the near-term. 

Am I missing something major?

I'll let the article speak for itself, but if I were to distill it down to a sentence: When it comes to wealth building, focusing on real estate is majoring in the minors. 

The VAST majority of people were of this.

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

A modern, updated kitchen is a major selling point for buyers and can significantly increase the property's value.

Although the majority of Michael's superb content on Cost Seg focuses on how to properly assess the value of Cost Seg, he also does highlight some items regarding the internal workings of a Cost Seg study.