How to build up up a low-cost high-quality 32 channel EEG heatset by ourselves?

By individual TGAM modules, 4 channel 16 bit A/D converters and Home Assistant. The example of Home Assistant has shown, that is is quiet easily to built up a multi-sensor device which very affordable. We do not know if this works. And no one has shown this to this date. But some physiogical sensors have …