I'm the author of the blog. Using the model that I wrote about, you "downshift" from a full-time job that has you on the front line, doing billable work to someplace where you're supporting internal business operations. This frees of you of conflict of interest problems and allows you the bandwidth to build up a side business, helping many of the same people you met previously in your career. The only difference is that it's in smaller chunks and time-shifted to evenings and weekends.