I just recently started my journey setting up Plex with *Arr and have had a blast. I have the setup running on a raspberry Pi. Before I start buying a bunch of external hard drives, I went searching for some dedicated server hardware to comparison shop. Am I crazy to consider buying an old tower server for this, or will a raspberry Pi work just fine for this purpose? I don't have that much experience but I do enjoy a good challenge.
A Raspberry Pi will not be good enough for streaming and the wireless adapter on it is pretty terrible. I tried using a Raspberry Pi and it was literally unusable for me so I bought a cheap Optiplex. I've been using a 3060 and it's been great so far.