Well I have a detailing business and I would say the biggest thing you need is money to make money. You will need roughly around $1,000-1,500 in supplies to do it right as well as setting up a business with your state, getting insured & bonded. You will need a rotary and random orbital buffer, compounds, polishes, glazes, MF towels, sealants, waxes, glass cleaners, bug removers, pads, hot water extractor, a canopy if you are going to be mobile, typically a source of power- generator, degreaser, gallons of wheel cleaner, carpet cleaners, vacuum, protectants, dressings, brushes, and marketing money. If you go to
www.autopia.org there are many pros and I would suggest buying the new V3.0 ebook as it contains a very thorough guide to starting up a mobile detailing business. Good luck and make sure you know your stuff before hitting the streets.