Playing hundreds of audio files simultaneously

I have 700+ ~5sec audio files and I’d like to create a stereo soundscape by playing around 100 of them simultaneously, randomly triggered and autopanned. The idea is to simulate a crowd by imagining a number of speakers, each of them emitting a random sequence of sound events. Each sound event spans the length of the audio file being played.

I’m sure there must be a sane way to achieve this (using MC or snowfall~ perhaps?). I’ve looked into poly~ but can’t do more than 30 voices without maxing out my 32 gigs of RAM.