Virtually zero I would have thought! Most employers in th I.T. sector will require experienced employees who have a proven track record within the field. I would imagine for every job advertised there will be numerous applicants whose CV will be bursting with previous hands on experience.
Don't be taken in by these "snake oil" salesmen. Enjoy your hobby for what it is but don't expect to make your fortune by completing a very expensive home study course. By the time you have finished it and "qualified" technology will have advanced to such an extent that your knowledge will be out of date!