Having rewired/replumbed a couple of my homes I am firmly in the camp that concealed utilities are vastly overrated. If this was "to code" and whatever was there mattered you gotta play the game and fish the stuff through but for stuff like ethernet, coax and control cables, especially ones that are "temporary" like a hamshack, go with the simplest and most direct you can. No need to put them in conduit or piping, with the closets I don't do anything to conceal them at all. In the shack, visible cables add to "authenticity". The more you try to make the installation look "perfect" (in-wall runs, wall plates, bulkhead connections) the harder it will be to change anything later. Drywall is a quick/easy patch, whatever path that gets you from A to B without having to fish through a wall is the goal. Even if you have to make a run outside the house and back in that works too and is how all the cable and sat TV guys do it. If you have to take aesthetic measures to conceal for the XYL that's still better than fishing through walls. When it comes time to leave just cut and pull, or abandon in place.
Mark K5LXP
Albuquerque, NM