When passing or storing data in code you usually have to specify what type of data is it. An int is an integer, so numbers, there’s also boolean (true/false) and many others. There’s also string which is just characters of any kind (for the most part) which pretty much makes it a catch-all, since numbers can be a string along with letters and special characters.
But to use a number as a number after it’s been received as a string it has to be converted to an int, which means extra code, more effort, more failure points etc etc.
I would do option A, but instead of just not using the free internet, I would use it for everything else not needing server services. So like streaming or general browsing.
Just leaving the Google fiber as a dedicated pipe for all my self hosted services
You can do this kind of split with pfSense easily