Using software like Propstream or DealAutomator are more expensive than D4D but you can generate a targeted list anyplace in the country and get out a lot more mailers, emails, and no-ring voice mails. 

They were working fine but we had issues integrating them with our property management software, requiring us to manually enter billing. 

There is nothing different about a contract with seller financing other than the section regarding purchase price and financing.Here's a basic provision:Seller agrees to hold a purchase money deed of trust and note secured by the property in the amount of $x at a fixed annual interest rate of y% payable in equal monthly installments of $z... with the full unpaid balance due, if not sooner paid, on [date of balloon payment, if applicable]

We respond to them that if that's what they want, we'll just hold out for applicants with 800+ credit scores and their property will sit vacant for many months.

I had a DF application denied since I was applying for the loan in my name, but had pooled funds with partners for the purchase. 

The applicant is trying to get you to trust them and is appealing to your greed. 

Excel and free software are great if you don't plan to grow very quickly or if you don't mind all of the manual data entry.

Is your roommate applicants launching a specific complaint against you?

We are also looking at some property management software.

The BP books are also a great place to get a solid base of applicable knowledge.