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

Welcome to the BP Community and most folks I know that are in your same situation with properties in 1 or more LLCs end up refinancing those properties into DSCR loans (instead of HELOCs) to extract the cash they need for their next acquisitions.

I don't know how the really big players stomach it.Something else I failed to mention was how the PM's are also tacking on fees on top of rent to extract even more money from our tenants. 

Question: assuming an ideal brrrr that has all investment extracted at the refinance, why would you choose a low cost market over a high cost market?

I've got a few more properties with a similar plan in mind—refinance, extract the equity, and use that to build toward my bigger target.The goal for me this year isn't just to buy more doors, but to make a strategic leap into larger-scale projects.

I will answer as it relates to traditional BRRRR, in the general case there are additional options.  1) Do not perform maximum cash extract.  

I would consider the cost of extracting your equity from the FL property by sale and then compare that to pulling equity by way of a cashout refinance.

No, I do not extract that income to live on because I don’t even need the $250k to live a pretty extravagant (To me a boring Midwest guy who never made more than $60k/yr while working.

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

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