. - Use a secure and professional rent payment method.

There could be an underlying problem with your methods of analysis and estimation or a lack of emotional discipline that got you into the mess to begin with.

@Stephanie Medina My favorite way to price my MTR is using the Enemy Method on Furnished Finder and Airbnb monthly rentals.

You are right, the return on investment might be higher with financing, but paying cash increases your monthly cash flow dramatically which seemed to be the concern of the OP who was concerned with only getting a $300/mo return. 

Good Morning BP members, I am starting my real estate journey and I am pursing the BRRRR method.

Also, title listed the property as a 4-unit with only 1 structure, but it's actually a 5 unit with 2 structures, which is another thing that has me concerned.

If you're in the refinance stage of the BRRRR method, feel free to reach out.

If you could only spend money on one of these marketing methods (hiring cold callers or sending mailers), which would you pick and why?  

If they are hurting the peaceful enjoyment of the property for other residents and we are concerned they will drive people to move, we non-renew.If they asked why we non-renewed, our staff just tells them we do not need to provide a reason.

We absorb the cost of ACH fee as cheaper than paying our bookkeeper to track down and enter other payment methods in our accounting software:)