Ductless heat pump basically….. I talked with a HVAC guy. Thought about 5k installed. Single unit that would handle our 54x14 with 14’ height. We’d put in a vinyl curtain over the opening for the adjacent 2 car garage.
….and yes Cab I’m still north of Needles, but we’re intending on moving to South Dakota in a year or so although she now wants to keep our AZ house too.