I use a portable AC unit and it works great. Mine is a combination AC/heat pump and we have used it in the Summer and Winter. Mine is the single exhaust hose system that some will say does not work, but after three years of use, all I will say is they are wrong. Mine has been used in temps exceeding 100 degrees and lows close to zero without any problems. I do connect the drain to allow condensation to be routed outside through a hose. The unit came with various adapters to route the vent hose out the window. I vent mine out through the dog house.
Mine does not need an outside cord. When on 50 amp service, and since it draws less than 10 amps, I just plug it in to one of the inside outlets.