How do you start door to door car washing business?

Get all the equipment and start cheap, then raise rates as business gets better. youll need a van or a truck and trailer(I've seen a large 265 gallon tank in a Dodge Caravan), you need a large water tank, a good commercial pressure washer(make sure its commercial, non commercial units are rated to be used like 6 hours a year, some weird rating system) you'll need cleaning supplies and a good vacuum, and things to make you stand out, advertising, sales, business cards and everything else required in your state to own and run a business(business license, tax ID, insurance, Special Insurance on your vehicle, ect)