There are a few things you need to start a waterless car wash business. First, you’ll need a car wash truck or van. Second, you’ll need a large enough area to fit all of your equipment. Third, you’ll need water and detergent. Fourth, you’ll need customers. Fifth, you’ll need to create a business plan and set up marketing and sales strategies. Sixth, you’ll need to make sure your business is profitable and keep up with the latest technology in order to stay afloat.