When sourcing a food caravan, you must prioritize the chassis and frame durability, ideally using galvanized steel to prevent rust. The exterior should be constructed from high-quality stainless steel or aviation aluminum for weather resistance. For internal components, ensure the electrical system is compatible with your target market's voltage (e.g., 110V for US, 220V for EU) and includes circuit breakers. Additionally, verify that the water system includes both clean and waste water tanks with a high-pressure water pump.