

If you are able to terminate Ethernet yourself or plan on being able to in the future (the hardest part is probably buying the crimping tool), you could just buy a spool of Ethernet and run it now. Either leave the ends loose, or you could terminate them into female jacks in wall plates (just find a good way to label them for your future self).
Depending on your budget, Cat5e would probably be fine, but if you want future proofing you could do Cat6. Technically you can go higher but that’s probably more than you’ll ever need.
Conduit can also work, but you need to make sure you’re able to fish wires through. Could be useful to think about how you’re going to do that, and it kind of depends on the setup. Some way of leaving a string, or perhaps fixing a string into a loop so you can use it as a pulley to pull things through. If it’s a short, straight shot that might not be necessary.
Been in my backlog for a while, and this may have convinced me to check it out soon.
Also I gotta say I love the idea of Mid game reviews. Everyone talks about great games to death. Terrible games get s ton of discussion and have the “so bad it’s good” angle. Mid games are often solid values and rewarding experiences that get forgotten about over time.