When evaluating hovercraft, prioritize the hull material, typically fiberglass (GRP) or marine-grade aluminum, for a balance of weight and durability. The payload capacity must account for passengers, fuel, and equipment without compromising the static hover height. Ensure the engine is a reputable brand (e.g., Kohler, Cummins, or Rotax) to guarantee global parts availability. Additionally, verify the skirt material, usually hypalon or polyurethane-coated nylon, which should feature a segmented design to allow for easy replacement of individual damaged cells rather than the entire skirt.