I have a 30x40 garage in Northwestern NJ, currently using a 25k window ac unit and it cools good, I can get it down to 63-64 degrees. My wife ******* about the electric bill if it hits $200 a month. I thinking of going to a high SEER mini split. If I'm ok with the performance of my 25k, will a mini split 25k do the same job cooling? Thanks