@domogled I couldn’t find the “run as a daemon” like pcmanfm or Thunar but there is some info on this file-manager in the Arch wiki: Nemo - ArchWiki
From what I read Nemo has been forked from Nautilus (now Gnome files) to be used by Cinnamon desktop environment. Should run on any DE/WM I think but not sure about the functionality you could loose when not running on Cinnamon.
You could also use Thunar as a replacement for pcmanfm. I know for sure it has the run in daemon mode, I used that for early mounting external sdcard/usb devices.