Installing a mini split doesn’t have to be complicated. Many DIY-friendly...

https://spark-wiki.win/index.php/Mini_Split_for_Garage_Workshop_400_sq_ft:_Should_I_Pick_9K_or_12K_BTU%3F

Installing a mini split doesn’t have to be complicated. Many DIY-friendly models come with a pre-charged quick-connect lineset, which means no vacuum pump or EPA Section 608 license needed