Is there a reason you're going through all this trouble? Most SS preamps and sources are never meant to be fully shut off. Sometimes, its recommended you leave a piece fully powered up at all times, and most others go into a standby mode where they remain partially powered up.
I guess that if you must have everything completely turn off, you could use a wall switch and do it manually. If you must be able to use the remote, I'm sure theres some type of home automation product that will allow you to shut a wall switch off with a remote.
I guess that if you must have everything completely turn off, you could use a wall switch and do it manually. If you must be able to use the remote, I'm sure theres some type of home automation product that will allow you to shut a wall switch off with a remote.