My setup folder structure is as such. My download clients have both a temp folder and a completed folder for downloads. The temp folder is for items downloading, and the complete folder is for items seeding.

You don’t want the arr apps pointing at the complete folder in my case as items are seeding from that folder. So items in the complete folder are hardlinked/copied to a “staging folder”. Arr apps then move these folders into my media folders and delete the items out of the complete folder.