Strangly enough, one of our big costs on those is testing them, for hours and hours and hours.
It would be a good news story, mysterious power surge blacks out Copenhagen or wherever.
CERN public funding is (was about 6 years ago) about £0.50 per person in the EU per year. Worse problem is placing these things, you need 30km circumference tunnels in geologically stable areas. It helps if they're isolated as well, the detectors in CERN can detect the TGV going past about 30 miles away.