How can I create a session that runs off the parent that will either inject itself every X processes and run the cleanup code OR create a separate session that runs the cleanup code, sleeps, repeat OR create a separate session off the parent that runs every hour. All of this needs to happen in a non-blocking state of the other jobs.

With regard to the title of your post, in the Cookbook, there's an entry /Waiting.

For setting up a cron(8)-like session, have a look into the OSCON 2004 Example programs folder.

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}