What is the size of the media and entertainment event market
(including sports, music, business, media, etc.)?
I'm just looking for some basic market research to help me gauge the
size of the media and entertainment event space. I'm curious to find
out the total spend on everything associated with putting these types
of events on from marketing to promotion to the physical space used.
Something generic and all encompassing is fine.

Unfortunately, your question might be too broad to be answered
correctly. Since Media itself can contain various markets both online
and off. Additionally, it's hard to gauge the total market without a
specific geographic boundary. Most market research data in these
spaces are limited to either national, regional, or specific niches
within.