Here's my parts list so far
https://pcpartpicker.com/list/DHZmTY
NCORE 100 Comes with AIO and SFF PSU. $370.61
https://www.coolermaster.com/catalog/max/mini-itx/ncore-100-max/#
Total cost is $1582 per unit.
Not listed is any 2.5GbE switch, TinyPilot or PiKVM (extra $250-$360). I could reduce the core count to 8-12 and memory to 64GB if heat and price is a concern. Wanted to see if I could get into an iTX format. Originally was going to use 3 HAF Stacker 915F but I can't find them anymore.
One of these could also be a desktop during the day so I could put a GPU in it and then put my TR into a datacenter or retire it.