I am considering adding a 3rd AC to our Bighorn. The current setup isn't keeping the living room/kitchen area cool during the heat of the day in this Texas heat. Has anyone installed one in place of the vent in the kitchen area? Will the current wiring support it? I am assuming that you can't run all three at the same time which I am good with. We would likely only run it with the living room AC during the heat of the day and shut it off and turn the one in the bedroom on at night. Any advice would be greatly appreciated.