Are there any best practices or methods to establish relationships with banks as a way to get around repeated credit checks ? 

No, I don't, so if someone calls asking about the BRRR method or flips, I'm probably not the agent for them. 

This is a perfect example of the "boring" stacking method to grow your portfolio.

New flooring, new paint, new deck, new landscaping (zero scape in front yard), new concrete including expanding the driveway to fit 3 cars, miracle method the tubs and shower surrounds, glass shower doors What was the outcome?

Anyone has done the BRRRR method with operating the homes as short term rentals in non vacation markets?

The Airbnb app hides phone numbers, but you can creatively leave your number by posting 1 number at a time or another method.

I also keep sharing my work progress and methods with friends and family for you never know that someone might be in need of your services or knows someone who is selling a property that would just fit your criteria!

But I was wondering if anyone has found success doing the BRRRR method with a financing option?

Its up to you. 1st scenario will arguably have you learn/scale faster while 2nd scenario is the more typical method for many.

There is a matrix I like from Jeffery Norton that uses the ppsf method and I think that is a good place to start as he has the numbers updated for 2021....however, for my own comfort I want a few GCs to go boots on ground after I have locked in a property through a contingent offer.