Your Construction Management course sounds like an apprentice program which has many courses the employee is required to complete in order to achieve apprenticeship.
I have in the past created the 50 unique course elements, with unique competencies for each of the required skills. The Construction Management can be a certificate that requires the 50 competencies.
I would not create one course with 50 elements.
I might even consider breaking down the 50 elements into sub-categories - to keep the learners engaged with the apprentice process.
The each quarters question needs some additional clarification from you. Do you have new employees each quarter for the same 50 courses? If so, just use cohort sync for the next quarters enrollment to the same 50 courses.