You do not need a separate LLC for each property or a series LLC!

Real Estate values, nationally, have never decreased over any 10 years. https://fred.stlouisfed.org/series/MSPUSFocus on optimizing active income first.

Rates are NOT high right now historically speaking. https://fred.stlouisfed.org/series/MORTGAGE30US   Sure, we have gotten used to historically anomalous low rates, but that does not mean we will get back there without the economy slowing down.

I have three LTRs (in TX) owned by a TX Series LLC.

I got to my current financial success through a series of well thought out endeavors but with a massive sink or swim element as I am often self guided..."

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For instance, someone making $500k a year and living in a very highly appreciating market might be extremely happy on a deal that loses $200 a month but is getting 5% appreciation on a 2 million dollar property in San Diego, butut that doesn't make sense for the investor with 30k and a lower paying job.When it comes to the book series I agree with you that the order doesn't make sense (having read both).

If an investor can create a Texas Series LLC for $350 and place each investment property inside a separate series at a cost of $27 filing fee, why not take this step to ensure that the problem of one property can’t flow through to the other properties?  

Dachtera who introduced prepaying the loan with a series of $3000 lump sums every ten months in addition to the regular monthly payment of $632.41.  

Could have been the F-series Tesla edition's, Mustang Tesla edition's.