When I tried netbooting 24 RPi3s in 2017, it failed miserably. Find out what changed when I built my private cloud with the newer Raspberry Pi 4s and K3s
Raspberry Pi Network Boot Guide — Warmest Robot + Warmest Human
New product: Raspberry Pi Zero 2 W on sale now at $15 - Raspberry Pi
Booting my Raspberry Pi 4 from a USB device
PiFlash: Linux utility to flash SD cards for Raspberry Pi computers
Raspberry Pi Chris Swan's Weblog
Arch Linux ARM network boot on Raspberry Pi 4 - Sven and the Art of Computer Maintenance
Distributed Computing on Raspberry Pi, Page 4, [H]ard
Netboot ANY Raspberry Pi with a RPi-PXE Server
Project, uCM4
Updating the Bootloader on a Raspberry Pi - Pi My Life Up
Ferdinand Keil Network Booting a Raspberry Pi 4 from a CentOS 7 Machine