However if I do a BRRRR I can achieve infinite return by extracting all of my investment.

Extracting information from GK Houses made me think of how Jack Ryan interrogated people in 24.

When you looked at the numbers on the top 3, they all had good cash flow and great appreciation (the numbers were calculated as though no equity had been extracted). 

However if I do a BRRRR I can achieve infinite return by extracting all of my investment.

I would not say I am confident in my experience but I will say I am confident in research, I have been researching extracting data from data points, and messaging successful airbnb hosts in the areas and I even have 3 meetings with 3 different Airbnb hosts this week to discuss over coffee about the ins and outs of how to be successful in this market or for them to just have a chat.

Assuming you have a loan on that property you co-own, you'll need to "extract" that equity somehow and convert it to cash to be able to use it on another property. 

Everything was volunteered and not extracted from the agent. 

This is a company that extracts fees and does the bare minimum to stay in business.

If I invested $100k in the year 2000 using the same leverage and no extraction of value in both San Diego and Cleveland, which investments do you think would have the better cash flow over the hold?

Refinancing: Once the properties are renovated and rented, refinancing can help you extract equity to fund additional investments.