For a commercial building in Summerlin South, the typical best choice for the HVAC system would be a variable refrigerant flow (VRF) system or a rooftop unit system. VRF systems offer precise temperature control, energy efficiency, and flexibility, making them exactly suited to accommodate the varied and intense cooling demands of Summerlin South's hot desert climate. Rooftop units are another good option, known for their effortless accessibility, scalability, and overall effectiveness in commercial applications. Ultimately, though, the building's size, usage, and even budget can dictate what HVAC system is actually best for it. So assuming an HVAC professional is consulted, what's the best path to take for system selection?