It may just be the local weather conditions in Cumbria but I'm getting keen on constructing a mud / earth structure at Rochelle to house the grotto now...
I like the association with primitive times, times when first a couple of people decided to move into a cave to speak in private. The first buildings ever must have been associated with a developing human desire for privacy as much as for shelter from the elements.
I'm liking the thought of the webcast tech embedded in it, and the fact that it can arrive on site and leave again in a wheelbarrow.
Call me a hippie, see if I care.