[chrishajer]

I’m afraid I still don’t understand what you’re trying to do. You will have those other forums and sub forums, but they won’t be listed on the front page? What is the rationale? Maybe a plugin already exists to do what you want.

Maybe the Hidden Forums plugin will help you.

https://bbpress.org/plugins/topic/hidden-forums/

If the forums are not listed on the front page, how will you get to them otherwise? And if you can’t get to them, why are they there?