Need Bonsai mother box (Small + Stealth) please help

As the title says: I am in need of a Bonsai mother plant that I can take 1-2 clones off of every week. I would love to make my Bonsai plant inside of a PC Case grow box as I know how to make the PC grow box for around 60 bucks. Anyways I am wondering if that would be enough space for a little mother plant thats feeding me clones. I am not clear on how to get clones but I know what to do once I have the clone in my hand (how to plant it, make it sprout etc). I saw a few guys on this forum with a Bonsai mother plant with lots of little branches everywhere and the plant couldn't have been over 4 inches tall!

Srry for the wall of text, hopefully someone can help.