Very interesting; I will look into that if my idea fails. I'm want to try something I can integrate with the Infotainment system, if I can get it to work.I went with the Garmin Power Switch. Mainly just didn't want to have to run cables through the firewall.
Got my electrical inspiration from the guys over at Blaze Off-Road. They have some cool installs for Tacomas and 4Runners that i adapted for my truck.