Boy, the first four paragraphs brought me back to 6 years ago this month when my wife and I did something very similar. We were both working for the same large corporation and had enough - I mean to the point of almost breaking. We had been kicking around a few self-employment ideas for a few months, and finally decided to pull the trigger - jump feet first (or was that head first?) into the deep end.
Has everything gone according to plan these past 6 years? Only if you consider the plan was to never be anything other than self-employed. Otherwise, it has been one heck of a journey, and still is to this day!