Forum Moderators: mack
I don't know that I would take this approach. People hate wandering into empty forums. Why not let users create the forums on demand, rather than doing it for them all at once in advance?
You will need a script to create a forum, and you will need a database of possible forum names (your universe of 11,000 "things").
I'm sure it can be done - I'd suggest digging into the SMF documentation. It will take some knowledge of PHP and databases.