Found a click or two in looking for storage and other system requirements:

  What About Raspberry Pi?
  Project NOMAD is designed for more capable hardware to support local AI. 
  If you're looking for a Raspberry Pi-based solution, check out Internet 
  in a Box — it's a great lightweight option for basic offline content.
  Project NOMAD is for when you want the full experience: GPU-accelerated 
  AI, comprehensive content libraries, and a professional management 
  interface.

Sounds like I should look at one of the other options mentioned there and in this thread, assuming their libraries and maps are basically the same. I'd like the “comprehensive content libraries” while travelling or when otherwise away from a reliable connection, perhaps with a useful management interface for easy updates and such when on good connectivity, but just in a format I can click or grep through. While I'm assuming I could just turn off, or otherwise ignore, the LLM side, just not having it in the first place would be more efficient.