A possible solution with other users also sharing their options
Okay, this isn't a definitive answer but simply one of many and i will try to explain as best as i can [am not the best at explaining so bare with me]

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I personally love the
Ubiquiti UniFi-AP range of products but i like the LongRange one which will set you back R1259.00 excl vat but you may enquire with
kernel if the mybroadband discount still applies

. He is a dealer for dbg. I personally recommend the Long Range model just to ensure you are covered as much as can be without knowing too much of your setup.
You can do some of the following:
*Uses PoE so no power adaptor needed wherever you put the device

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*Setup individual speed profiles for each device. Changes can be made on the fly.
*Guest network with limited data or time-limit [friends coming over].
*Deploy the software to track status in the cloud with Amazon AWS free tier [at work, see what is using data in realtime]. If you choose not to do this, you need to run the controller software upon boot all the time. I personally don't do this as i had some issues due to java when upgrading between versions. Your miles may vary though. I also had mine setup as a windows service but that did not resolve my issue.
I currently have mine setup using Amazon's service and can give you access to have a look at how things work. Am running an older version of the software but the core functions remain the same. This is v3.1.10 [i am not sure how to upgrade to latest without losing historical data] heh
Apologies if this isn't what you looking for

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Edit: Forgot to add - PS4 Firmware 2.55 went live yesterday which should account for around 244MB and if you have GTAV then the PS4 update around 6GB also?