Peace , Lubin
The right place for the TC is in the ground beneath the current school, because the reason for it being suggested was because the school is closing this year.
The real problem is the precedent it creates, and not just at Silbury. Anyone with a media-friendly suggestion will have to be taken seriously in the wake of this foreign object being placed where it shouldn't. Maybe Avebury will have ash-scattering days [£150 + VAT] set aside for those of us who'd like a bit of us left there after we die. How about Men-An-Tol being hired out to childless couples for sexual acts in the hope of increasing fertility [Half price if you don't mind being on webcam]?
My application to turn Grimspound into a Bronze Age Experience Theme Holiday Village was turned down...