Yes, well said Chris.
I wonder if the problem is with the producer rather than the presenter, so often trying to get the familar story of an over-ambitious project running out of time and budget? Just not possible on this one, or on the other one which was so inspiring to so many people, where woodsman Ben Law built his own house for about £20k by being a thoroughly nice bloke who let people help and learn skills.
McCloud does seem to be interested in people who can imagine things and then make them.