Is it possible to have several cheap cameras set up ahead of time in each of the rooms so that as they enter each room the examiner just has to hit the record button, (or trigger remotely)? If the exam takes place in the same house always they could be permanently mounted. The trainee could wear a wireless and each camera could have a receiver tuned to that transmitter.
This makes for boring production value but I do understand that that's not what the certifiers care about. They are simply needing to see the process. Of course the best of all worlds would be to have the budget to hire someone to follow the trainer & trainee with a camera. You could probably find a college student to do this cheaply enough.
Mark D'Agostino
http://www.synergeticproductions.com