Hmm.. I am familiar with PMA. I would for the purpose of this project consider it too technical for the target user base. The point is to create a GUI layer that would manage these things.
For example, the 'add client' screen would ask for four things; name, description, username and password. Then behind the scenes a database would be created, the user created, permissions granted and a pre-configure set of tables built (and populated). My reservations come from security issues (which, as an aside, are also discussed about PMA), allowing a normal user account CREATE and GRANT on the database. Maybe I'm being too fuddy-duddy cautious.