Hi, I plane to buy the $799 mac mini and upgrade the ram to 16gb. I want to be able to encode videos at times but mostly want to be able to stream to multiple rokus, and idevices at the same time. I will be storing my videos on external drives. Now do I leave the mini on at all times if I always want it to be ready to go or is the plex app able to "wake" it from sleep? Also do my hard drives stay on at all times also then?