Will there be free admission for people who want to worship one or more of the Gods. as there is at St Paul's cathedral?
You mean if I want to worship Vishnu and/or Odin I can get in free at St Paul's?
I have no objection to places of worship that are also tourist attractions charging the tourists for entry. In this case, the charge seems pretty low at €5. It cost me about £20 to get in to Canterbury Cathedral last year.