I agree with Elaine and eliminate the French doors and opt for windows.

Your number will grow exponentially, not linearly and your blind spots are expenses that you are too frugal to manage today but will eat at a higher price tomorrow.The goal should be to eliminate expenses via consolidation, have multiple sources of income, and carry low risk(debt). 

Personally I avoid buying anything built after 1950, which eliminates most of Downtown Suffolk. 

Online research is a way to eliminate properties, not add them to the short list. 

A tax deed eliminates most but not all interests of properly notified parties. 

Our plan is to start this as a side business (we all have day jobs) and play the long game until we can eventually switch careers entirely.Books I've read recently:1) How to Invest in Real Estate, Brandon Turner2) Rich Dad Poor Dad, Robert Kiyosaki3) The Richest Man in Babylon, George ClasonMy goal is to eliminate as much ignorance on this topic as possible.

But I see that they eliminate your living room and dining room, instead putting in more bedrooms. 

I would make sure if it was installed in or above a finished space that it had a pan underneath it in case of a failure to eliminate/reduce possible damage.

I’m working to eliminate those in most of my buildings through the Installation of propane heating systems.

You can do all you mentioned above but you cant eliminate some of the luck factor involved.