Something like this that encrypted and uploaded to IPFS would be neat.

I have a full batman-adv mesh on openwrt routers. That’s maybe what you are after? Full guide in the link https://cgomesu.com/blog/Mesh-networking-openwrt-batman/

Also on Odysee (at least an alternative) https://odysee.com/@fireship:6/paying-for-software-is-stupid…-10-free:5

Not much help right now, but looks like voyager has it on the road map. https://github.com/aeharding/voyager !voyagerapp@lemmy.world

Has anyone compared it against seaweedfs?

Logseq is pretty close