Furthermore, there is no mathematical argument for waiting 27 years,  or whatever your depreciation life is.   

I have been calling this out for many months now, it's mathematical.

Most of it CAN be put on a schedule, weighed and measured, so mathematical decisions can be made. 

Makes no mathematical sense.  

Buying cash just mathematically doesn't make sense when 30Y *fixed* rate available.Brilliantly stated!!  

The shares will trade at the parity value of $1.2 Million / 200k shares = $6 a share.This is PREDICTABLE and it is MATHEMATICAL.

i know mathematically with the refi till you die crowd its not the best on paper.. but boy what a safe position to be in.after all there is untold value in live well sleep well with zero debt.. especially as you get older.  

I constantly crunch the numbers almost monthly to see how much money I am making when including the amazing increase in the property's value each time I raise the rent and I do my math over and over so that I am excited and I can do the math in my head.So, when the tenant spit in my face my mathematical mind went into overdrive and this irate tenants idiotic move that resulted in an eviction just earned me a big fat paycheck.

Rental properties are nothing but a mathematical formula, just like owning a stock it is an inanimate object and a financial vehicle to get you to your goal.

This is a huge mathematical problem that is very common among REI of different levels of experience.