Update:
Thanks for the posts above, it helped immensely (even though I am still learning [slowly] so a lot of it is over my head).
I installed a New copy of TES and all of the CC content, cleaned the "dirty" plugins with SSEEdit, (strange how all the dirty ones were from "official" CC and Bethesda) which left very few loading reports in Papyrus.
The original "Battle-born Farm" problem was caused by "Valkyrja Castle" mod (thanks Leonardo) and the Weaponsrack errors were caused by "Valkyrja Manor" mod (Thanks Arthmoor) - Both mods consigned to the Do Not Use folder.
It appear