'Heavenly Sounds' at earthly prices...

So I was gonna head to St Stephens in Sydney next week because I want to check out how they set up and do the 'Heavenly Sounds' Concerts where this series is with Lisa Mitchell.
Then I discover it's coming to Newie at Christchurch Cathedral which is only 12 mins away BUT it's also $55 first in...
So answer one to the 'how to' is they plenty of cash to pay for the set up... hmmmnnn... will I won't I?