Let's get a common filesystem going. Some of these things, you'll have to do after you get an actual Pi Zero going,like anything using the HEAD_IP, which will be the Raspi B. Right now, I am still on the Raspi B, building the final image which I will then copy to each SD card.

install/setup nfs clients

apt-get install nfs-common -y

mkdir -p /mnt/nfs

chown -R pi:pi /mnt/nfs

mount [HEAD_IP]:/volume1/nfs /mnt/nfs

Add this to /etc/fstab

[HEAD_IP]:/volume1/nfs /mnt/nfs nfs rw 0 0