Ideally, we would be able to record from 20 or so stationary locations from well-matched microphones with flexibility in how they are set up (stands, on tables, stuck to walls, etc.) and 2-4 headset microphones, all wirelessly with some way to document the spatial location of the microphones. Is this even feasible? Perhaps with the option to have them all begin recording at the exact same time.
An easy way to sync them all: connect all of the microphones to one multitrack recorder (e.g. microphone ->AD converter->computer with DAW software).
Recording the spatial location must be done separately. Measure their positions and make a sketch of the room with the microphones. Use photos. If you want to be really fancy, use photogrammetry or a laser scanner to build a 3D model of the room.