I'm not soo sure but as in any research, you will need to prepare a questionnaire, take a sample size, gather secondary data from magazines and internet about weddings and the grandeur etc, analyze the data and come up with concrete results.
As for any analysis of RM, you need to know define the problem first and then revolve your research around it.
your explanation and detailing of the topic doesn't give me much room for helping you further than this.