At what point should one begin the Capstone at TESU?

[Pelican]

I have heard that TESU's Study.com discount may end soon. But I'm not finished with all of my BA degree requirements. At what point within the program can one begin the Capstone course? Could I begin the Capstone course in May, then still complete some of my course requirements in the Fall 2018 (some courses, such as Historiography at FHSU aren't available until then), and still graduate under the Study.com tuition discount pricing? Or do I have to finish everything this Spring?