Brrrr method cost vs cash snowball

[April Robbins]

Can someone break it down and explain by example of how you can make more cash flow with Brrr vs cash snowball. Right now we take cash flow from rentals and save to buy next rental property with cash. How much more could we grow if we tried brrr. I’m just afraid of getting loans that we have to pay back but I see this used so much. I want to know advantages or if it’s quicker way for us to build cash flow