Good point. Let me think through this. I have about 15T free space so this can be seeded separately in ~12 batches.
You can also distribute different torrents, it's easier.
Or multiple IPFS CIDs. I think you can have a "directory" (CID) that contains multiple CIDs, and only need the content hashes to build it.
You can also publish multiple CIDs and ask people to seed random ones; that's how Libgen does it (and is similar to the multiple torrents concept).
The same file can be used to seed both torrents and IPFS.
You don't even need to store it all at once on your computer: stream it and generate checksums on the fly. Then distribute the torrent, and seed sections at a time. It can also be distributed on IPFS.
I've seen a lot of torrents being used for distributing neural network (mostly stable diffusion forks).