BRRRR Investing Method/What am I missing?

[Stephen Ball]

The BRRRR method of investing sounds great and I've been doing research on it to understand as much as I can about it. The one thing that keeps confusing me and makes me think its nearly impossible is the 3rd R, Refinance. The reason it seems so difficult is because there's no way my debt-to-income ratio would justify the loans required from banks to refinance. I wouldn't be able to BRRRR more than one or two properties. Is that just the end until my income goes up eventually through real estate? or am I missing something?