It's pretty easy to get the pc to shutdown after the backup completes, Acronis can wake the computer up from a low power sleep, take a backup, then shutdown. You could even turn them off completely and use wake on LAN to power them up for the backup remotely during the early hours.
Nothing wrong with cheap gigabit switches in my experience, i've got a couple of cheap Asus ones that cost me something like £20 each 4 years ago. Still going strong and have no trouble shifting gigabit traffic over them (I get over 100MB/s, without jumbo frames enabled (though they do support them), and am probably limited more by my NICs or TCP/IP settings than the switches themselves)
Since you've determined there is a case for >= 2gb/s , why not move your server and managed switch into the studio? that way you can team nics to your hearts delight, and just have a single 1Gb/s link back to the house which should be plenty for net access to the studio and any media you are pulling from your server over wifi.
true, but my experience with WOL hasnt been great.. :/
well in my experience they haven't been able to maintain gigabit speeds at all, when compared to a better make/model.
one problem with putting it in the studio....noise. Can't have noisy servers running in the background really... :/