Currently I've been running been running plex on my main pc, and for the most part it hasn't been an issue but lately I've been running into the limits and can't game while watching certain streams so I want to build a server. I've also been running 2 minecraft servers on my spare PC, one is heavily modded and it pretty much requires 8gb of ram to itself, the other one is vanilla and is doing fine with 4gb but anytime I have company over I have to shut down the servers for the PC to be use able so I am just going to break down and build a server. I plan to run FreeNAS as my OS but I am undecided on the type of hardware I want to use. I want to use old server hardware from ebay but I don't know anything about the server industry so I'm not sure what I'm looking for or what would fit my needs. Is it worth my time or should I just build with consumer parts? If server parts, leave suggestions on cpus/motherboard
Also I should note that I most of my Plex media is in 4k, for two of my 4k tv's but I also often watch from my phone or 1080p kitchen TV. Usually up to 2 people watching at a time. So transcoding on 4k may be required at times.