to go to the effort of running a business, and from my experience, really you need to be earning twice that, if you get a problem with a van or machinery then if thats all your earning, it could put you out of business in a day!!
i really dont understand why some people go into business for that sort of money, your better off working for someone.
another thing that everyone is missing the point with is this, you cant go in to a job with the price as your selling point, you need a usp, just take a look at woolworths, they didnt have one, now there gone, simple!