Installing a mini split system yourself in the US can offer significant...

https://meet-wiki.win/index.php/Why_DIY_Heat_Pump_and_Mini-Split_Installs_Fail:_The_Real_Cost_of_Rushing_Refrigerant_Connections

Installing a mini split system yourself in the US can offer significant benefits—if you know what you’re doing. First, you save a substantial chunk of money on labor costs, which often make up 40-50% of a professional HVAC installation