I don’t know if I’m alone on this, but I just bought the biggest 5400rpm HDD that was in my price range when I set up. Might notice the slower speed when doing a big data dump, but for streaming purposes you can run many 4k streams concurrently and the bottleneck would probably be your network speed before you hit a drive read bottleneck.

There really isn’t any “hosting” with Syncthing. Everyone sharing the folder is kind of hosting.

It’s also great for sharing files with friends/family. I gave a couple of friends a folder address, and we all just drop shit in there that we want the others to see.