I paid cash and roughly 25% of retail value. 

I second the suggestion to take the payment plan.

Your debt is easily found, I suggest you disclose the loan. :)

My father became interested in real estate investing, and rather than my tutoring him, I suggested he take the Nickerson - Lowery course/workshops.  

Does anyone have any suggestions or recommendations?

@Jordyn Ohs Suggest you run a financial model and assume 100% vacancy.

Thank you all for your feedback and suggestions, I greatly appreciate your help!

If their lease date is far from being over, I suggest letting them know that they have violated lease terms under section x (whatever part of the lease they violated) and that the lease will be terminated in 30 days.

Any suggestions would be greatly appreciated.

JamesI work with the loan programs through wholesale lenders so you wouldn't be able to go direct unless they have a retail side.