I think you're on the right lines but you would have to do £1000 per week. Many of us do that in a day, but not every day and it's what you do over a year that counts, I think £50,000pa is a minimum if cc is your main income. Less than that and you may be better off in a job with sickness pay, paid holidays and company car(Aah I remember it well!) that's assuming you could get a job of course.
Many of the guys on here earn much less than that but it's still more than they could earn in a job, don't criticice them for it at least they're working, many of the UK population don't contribute to the national wealth, they only take from it.