I'm in the market to purchase a mini split unit for my room which is in a pole barn. I've been trying to research the different models and cannot find enough reviews to make an informed decision. I've been told that I need a 24,000 BTU model. I've got 7,500 watts in a 23'x11' room. I've found them ranging from $900-$3,000. I know you get what you pay for, but anyone with an opinion or experience to shed some light on this, I would appreciate it. The brands I keep coming back to are Air Con, Kilmaire, Mr. Whisper and Shinco.