...
The hard bit is getting themselves motivated and going out and finding the work, this is where most fail dismally.
From my own experience going self employed... it wasn't motivation which was the problem in going out and finding customers... it was the fact that i'm a bog awful salesman.
being self employed is much more than having a skill which you can sell. You also need to be the secretary, salesperson, accountant, tea lady, cleaner, customer services and so on.
edit... just realised Night Train has made this point already.. sorry.
regarding bullying, my last job i walked out of because my boss (a top bloke socially) started being a tit regarding my workload. I had some 150 clients to manage single handedly and for months i'd been asking for help. His answer was always "we cant afford any more staff, but when we can, i'll get you some help" but then that changed to "If you can't cope, you're going to start getting warning letters, and if that doesn't work your job will be on the line." After a couple of these threats I told him i had no interest in working for him and did one. Much happier now