That was very helpful. Thanks! I do indeed use my Pi-hole for DHCP as my router will not pass through the names of my devices and trying to figure out what is going on by IP is a PITA. I do want to set up one of my other Pis as for redundancy, and I saw a YouTube video on how to do that and keep them synced.
Did you see my thread on using Pis vs x86 boards for a small cluster? Would you mind weighing in on that at some point?
I appreciate your time!