DIY Ganglion AFE

Hi all,
I'm thinking about designing my own board based on the ganglion schematics/layout. I'm really just looking for the lowest-cost solution for a scalable system. I'm planning to cut out the SD card/accelerometer/RF/microcontroller circuits from the ganglion, and retain the basic AFE topology/components. Then I'd like to have an ESP32 or maybe Pi-zero handling the control/communication in a way that I could daisy chain the analog boards to go up to 8/12/16 channels. I don't want to reinvent the wheel though (and I'm not completely confident in my analog layout skill), so if anyone knows of similar open-source AFE boards already out there then let me know. Otherwise if anyone has relevant design experience and would be willing to check my layout then I'd appreciate that too. I'm also more than willing to share component/board fabrication costs with any other interested parties