You may have to Sell with many different methods.

The problem that I am having is that when I use the four square method for analyzing rental properties I am getting a cash on cash return of about 6 to 7%.

If the bank uses Fannie Mae guidelines (so they can later resell the loan), it's either six or ten depending on the underwriting method, but I also know that lenders I talked to in Florida were using a more conservative limit of four.

I am interested in using the (BRR) method.

I got started house hacking, local, hands on, learn as you go, everything under my immediate control, expanding at a conservative but steady pace as my knowledge, skills, and capital allowed ... learned risk management actually from my career as a spacecraft systems engineer ... basically, you methodically map out all of the risks (ways things can go wrong) then reverse engineer your investment and financial position in that investment to hedge, mitigate, or all together avoid these risks.

Method of delivery is irrelevant as long as you receive it by midnight on the day it is due.

My other property, I got a HELOC out on in the hopes that previous tenants were going to purchase it, but that has happened yet, so I should have done the BRRR method on that as well.

That's not really how hard money works....You can find creative methods sometimes.

In my mind if you know it is a verified email address, this would be a better method over snail mail

One thing that is really nice about this method is it takes a lot of the emotion out of the deal very early on.After you identify your target renter, look at the market and where you want to find a property.