I can add value that could allow me to extract all my investment, but I would have large negative cash flow after the high LTV refi rto extract my investment.I recognize not everyone has an up to date profile (my profile does not include my last two acquisitions) but not one person that posted that brrrr are still a viable option has a single brrrr in their profile.  

you must add significant value in order to extract your investment.  

You have to be prepared to really push yourself to extract the maximum potential value. 

I would put my cash flow against any residential (<5 units) against anywhere if we were using purchase cost versus realistic estimate of expenses (note this would be as though I had not extracted any value, in reality my cash flow is modest because I have extracted value regularly).How would my cash flow be so great?

A Wholesaler, a tried and true Wholesaler, brings 0 value, they only extract.

Wholesalers are your competitors, not your friends.Wholesalers are extractors, that's literally their job, to achieve maximum extraction from a deal.

I'd like to extract some of the equity out of it via a heloan toexpand my real estate portfolio.

There may be some minor items we can extract out of it.  

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

Extract equity and repeat.The Austin market has shifted from a seller's paradise to a balanced market with actual investor opportunities.