Do roll out tables. 

I was ultra conservative in that I did not max out the equity available to me but left some on the table for the in case scenario.  

Definitely a unique position to be in. 

If it's just speculation, start by reviewing the law to see if there are any unique requirements for a business.

Your record of this deposit (via teller slip or online transfer) will be your receipt of payment.This elimates complextity and the additional steps/rules that come with using a third party to collect rent.I get an email alert when a tenant makes a deposit, and each rent amount is unique so I know who has paid in case they don't have the teller add a memo to the payment.They can transfer funds online, or walk in to a local branch with cash, personal check, wampum, etc. 

@Jim Stoffey  I do a little bit of this type of work... and from the Money's side of the table they are taking all the risk,, you simply risk time.. and if the deal is that great it will all work as long as you trust them to be fair and honest...

They have told me that they have lost their deposits over really minor things like cig butts in an ashtray or empty beer cans on a table. 

While DSCR loans tend to have interest rates a bit higher (generally 0.75% to 1%) than the other two options, which can challenge cash flow, this comes with some advantages that are uniquely suited to the BRRRR method.

This will give you the opportunity to see how each of the disciplines are unique and different, and profitable for the time invested, and allow you the chance to decide which segment to become an expert in.

Anything where a company makes it 'easy' for you, they are going to take some $$ off the table right away.