What exactly is the set-up of this course? Are you a professor teaching a huge lecture with 200 students, and you want your five TAs to grade separate sections with one big Canvas course?
Or, are you developing a course such as English 101, which will be separately taught by five different teachers? In that case, will these five teachers be personalizing their sections with their own welcome messages and so on?
If the later is the case, I would recommend creating a "template course." You could also create a "development course" and then have the instructors import the content into their own individual Canvas courses.
Could you please explain more about your plans and how much autonomy each teacher will have?