Do we really know how successful it was. Plenty of small businesses have no retirement plans.
I was pointing this out in response to a comment that appeared to be thinking in terms of a retirement plan that would be typical for a medium or large corporation, not a small business with at most a handful of employees like what Charles had. As for how much income he had, he at least claimed in one document I saw here (or linked to from here) that he was claiming to have and income of 20K per month. That's not as good as what Chad and Lori claimed, but is more believable too.