Suppose part of your motivation for understanding networking was the desire to set up a "last mile" sort of ISP in your neighbourhood/town, where you lease fibr

Suppose part of your motivation for understanding networking was the desire to set up a "last mile" sort of ISP in your neighbourhood/town, where you lease fibre capacity from someone with fibre in the ground, then you build out a wifi or wimax network that, every so often, terminates into this fibre; is this the correct learning path to take, would you say? How helpful/essential is the knowledge?