Installing a mini split system yourself can be a smart, cost-effective solution...

https://smoothdecorator.com/why-diy-savvy-homeowners-struggle-with-climate-control-projects-and-how-to-overcome-the-hard-parts/

Installing a mini split system yourself can be a smart, cost-effective solution for homeowners in the US who want efficient heating and cooling without the hefty price tag of traditional HVAC installation