I have never tried freenas will have to look into it i also have Plex running on my media pc (not the premium yet still need to purchase that) ill send u a plex invite oneday wen i get this server off the ground....i have never use Transmission,Sickbeard or couch potato so will have to look into that soon aswell. I'm using Dropbox at the moment for photo's it seems to be working ok ,
Main use's will be docement storage & HD-4k Media so a Plex will help with that ,Could possibly use the server to host games aswell if need be
Well let's face the facts storage is expensive Yes
Do we need it - Yes
Does it get cheaper over time - Yes
Wil u see the huge loss of $$$ building a server like this yes but only in 2020 with 10-20tb drives so for a 6 year build this server is fine