If I'm understanding this method correctly you basically have to keep investing otherwise you're going to be stuck with a loan at 75% of the house for 30 years?

If I understand the Refinance piece of the BRRRR Method correctly...

I have been trying to discover a meaningful method to read the areas social structure, economics, etc. 

Can the BRRRR method be applied to small businesses?

I'd start with saying "hey, we need to put a deposit on the place with the new lease", start at the full amount and make yourself look good by taking a bit less than that and doing the monthly increase method for the rest.

Problems After closing, and my property manager talking to each one of the tenants, trying to a) see which month to month tenants can sign a longer lease and b) changing the payment method from dropping checks to the office to either paypal or bank deposit, we started having problems with 3 tenants. 1) Doesn't like depositing checks or using paypal, was agressive to property manager and is breaking her contract by leaving on Saturday because she doesn't like the way the new management is running things. 2) Find out that the other tenants pay more money than him for rent and wants to pay the same amount as the others or leave. 3) Also doesn't like the new management and will leave at the end of her lease this month. 

This method would not require monthly payments which is a big benefit in managing cash flow over the life of the debt.

That's the most effective method.

So like you I will just continue to explore things and size up my options as they arise.Good Luck with your activities. 

What did you do to convince your lender or find the right lender to find a 80/20 refinance for the BRRR method?