Trying to setup a computer without internet (not for security reasons, distraction from working on stuff reasons) is far harder than I thought it would be. This computer is on another location away from wifi and ethernet and I don't want either.
Several distributions work live from cd DVD USB or microwave-- but none install to this 2018 Dell XPS desktop.
Again, this "air-gapped" computer isn't for security reasons.
So far, void linux and knoppix work the best live.