Is there anyone that knows the BRRRR method that can advise? 

He apologized for the lack of communication.

And if you are subscribed to a monitoring plan that includes cellular backup, your Base Station will still communicate with our cellular connection back-up."

This needs to be addressed quickly and methodically. 

My Milwaukee clients aren't using that method, but as you know it can help with closing deals quickly.

With that being said, I plan on conducting business doing the BRRRR method.

They typically communicate that they will be late and do end up paying the full rent plus the late fee by the end of each month.Unfortunately, we've reached a point this month where they submitted a partial payment at the beginning of the month and have now become unresponsive and have not paid the monthly balance.

Here's a simple method: https://www.facebook.com/share/v/L3rQkN4K5teAtk3r/Do this enough times and soon you'll be analyzing properties in your head or on a napkin. 

I prefer to stay within the guidelines of communication practices outlined by each.

They should be responsive and communicate clearly, possess a strong understanding of the local market, offer reasonable rates, and support borrowers throughout the process, all while ensuring legal compliance to protect your interests.