That's my thoughts exactly. He could even queue it for during the day, as we're both at class or busy with work then. I doubt he'll think too much about of it if I limit him though. He probably won't even notice. If he says anything, I'll just tell him our account is probably being throttled for using too much bandwidth.
I just checked my router, and it does have QoS in the configuration. I'm just going to see if I can find some documentation on the TP-Link site, because it seems so complicated,
I don't think Cisco professional would be able to figure it out on his own. 
Thanks for the advice guys. I didn't even know you can limit it without third party software installed.