Or.... they could finish building it, put a roof on, fill in the gaps with glass, add a nice patio area round the outside... sell it on as a:

'Large round house with easy access to the A303 to London, ideal for commuters and easy no holds barred access to the Solstice, perfect for the Druid/Pagan/Crusty in us all...'

Troublesome druids/jugglers/pagans/nosey people could be detered by big signs 'Get orf my land' and an electric fence... sorted! ;o) I think I'll go and work for EH!

Bobs yer uncle and fanny is the doctors neice or whatever the phrase is... ;o)