The cirriculum is certainly demanding, and requires much patience from your students, if you choose to do so.
The kata you've listed (Naihanchi, Seishan, Wanshu, Passai) are usually taught at higher ranks, than what you've listed. However, since your time requirements are also similarly long, those who stick it out should be able to do just fine.
However, we now get to an interesting crossroads... By using these long length of time requirements, what kind of student retention do you plan on having?
The time requirements are tentative depending on how the students progress and how much extra work they are willing to put in. The student retention really doesnt matter to me as I truly am not going for quantity of students but rather quality
