Request a support call
I want to talk to someone at apple support about my organization's needs and ensure if Apple Business Manager is the solution before I enroll.
Mac mini, macOS 10.14
Apple Business Manager is definitely part of any solution for an org with Apple devices. It is free to enroll.
This is a user to user forum. You can contact your local Apple Store's business team, or you can visit Apple.com/business to connect with someone who can assist you further.