Installing a mini split can save money, but you need to get the details right....

https://www.runway-bookmarks.win/thinking-about-installing-a-mini-split-yourself-i-ll-walk-you-through-the-key

Installing a mini split can save money, but you need to get the details right. I’ll walk you through drilling the 3-3.5 inch hole for the line set, choosing between 115V and 230V power, and using quick-connect, pre-charged lines to make the job smoother