Hello bulabog
Sorry but I don't think you are getting how this works.
"2. Once in maintenance mode, I then go to the VSAN disk groups and delete the Disk Group for the host I am working on."
There is no need to remove the disk-groups when re-installing a host.
"4. I then exit maintenance mode on the host, then put it in maintenance mode again this time selecting "Full Evacuate Data" "
The host was already in MM so this changes nothing and is unnecessary.
There was no data on the node to evacuate as there were no disk-groups...
Bob