My credit should be the highest allowable also and I shouldn't have problems with approval.

For example, I mention that every adult must pay a $30 application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.

Why is your tenant paying you by credit card? 

They look at your credit profile and get you business lines of credit and credit cards.

What's the lowest credit score you will allow?

I have done it with some contractors taking Paypal where you can use a credit card on that site with a fee, or QuickBooks is another one too.

Rate will be highly dependent on loan size, credit score, LTV, location, and property type, as well as a few other factors.

For context I am a full time lender and understand DTI and have very good credit. 

@Donald Hatter We send the information to a collection agency who attempts to recover the money; after they make several attempts they place it on their credit report. 

Obviously price wise, Rent Redi was the lowest.