Trash all the books, get an old $200 van spray some paint over the rust spots, get a throw away cell phone, so you don't have to be bothered with complaining customers, and take out an add like this
http://losangeles.craigslist.org/lgb/sks/346253499.html , oh just one more thing tell them you have been getting some bad checks, so you require cash for payment.
PS don't forget if they want wire nuts with the $25 fixture install that is an extra, basic install is twisted wires with one wrap of tape.
Operating a business as described above will always lead to problems, take the time to plan how you intend to operate your business.
