Hey jwh92020 ,
You may want to look into the PTAC style A/C. (Packaged Terminal Air Conditioner) These are the type you find in motel rooms and many have the heat option. They are designed to be mounted at or just above floor level and leave just the front cover/ faceplate protruding from wall. (approx. 8") The outer cover is normally permanently mounted to the wall and the A/c unit slides into cover from the room side.
I actually own several and use one as a window unit in the den. It just so happened that the windows are 4' wide as are the PTACs I have. I believe mine are 220v units, but I would guess 110v units are available?
http://www.amana-ptac.com/McDave