What kinds of things would an entrepreneur need to know before starting a car wash business?

One should always get a feel for the marketplace one is entering. An entrepreneur should look to see what price points competitors are offering, what services they are performing, and one should also look to buy the most efficient and cost-effective products (those that clean the most for the least amount of money). One also needs a great location, as the three rules of marketing dictate what is really important is location, location, location. If you can compete with others, have a nice location, and then run a business so that the expenses are small while the potential for profit/profit margin is large, then you should be on your way to starting a successful business. Good luck!