Like anything else in this game... start with budget, then on to what your goals are for your recordings, what is the acces level of the room (open or stealth).... do you know someone who you an borrow gear from, buy a ticket for and see how it works... You can prep a rig for under $200 to get started and the sky is the limit on the high end gear.
Small room, good acoustics, quite show environment - omni.... noisy crowds, cardiod... Giant Squid, sound professinals are less expensive, DPA 406x are fantastic small mics..
From a stand - ADK 51TL's under $1k LD's, Peluso multi pattern SD's around the same I think.. then you need a stand etc..
Maybe search the member base, find a couple people close and tag along to a show and see how it all goes...make a friend, borrow some stuff, and then move into purchase mode.
Good Luck!!
CQBert