That $1829 is quite pricey. Two years ago, I paid $1248 for a Pioneer 18,000-BTU 20.8 SEER heat pump mini split. It is an inverter design, which means it has variable speed and will automatically select different speeds to match the cooling/heating demand. Single-speed units will cost less.
I just looked, and the same Pioneer 18,000-BTU unit is now $1378 with a 50-ft line set. The manufacturer is Parker Davis, an American company.
I installed two mini splits myself. I had access to a vacuum pump, and a nice electronic HVAC vacuum gage that measures down to a few microns of absolute pressure.