However, there's an opportunity to owner finance 3 duplexs as a package deal in the next town over. 

@Michael Costanzo has some good advice there ^^ I'm not sure how many properties you have, but the other thing to consider would be a package policy (1 policy for all of your properties) this type of policy can be of a great benefit if multiple closings per year are expected.

But buyers buy a package.  

We are about to purchase a 13-property portfolio of singles and duplexes under one packaged commercial loan with an interest rate of 5% over 15 years. 

I just sold 4 properties out there in a package.

@Ronny Crawford I have a package in Cobb you can cherry pick.

@Tim Richardson I'd purchase a small package of homes in Memphis, TN that are professionally managed by an established provider!  

I currently have a Quickbooks subscription, but I can't justify the larger package that provides me with additional reporting features.

They will definitely try to sell you a $40K package and try to make you feel like you're one of the "chosen few" just because they asked you for your money.  

I think it's best to use something that integrates with QB instead of an entire accounting package that most bookkeepers will not know.