Well ideally having it on a VPS would give me on-the-go access to the most recent copy, which might not be as important if continuous background sync between my home PC and iOS really works with syncthing.
Having someone steal my keepass database file would be suboptimal, but not the end of the world. I don’t think (or at least I really hope) that current tech can’t brute-force keepass databases.

Thanks everyone. Syncthing does seem like the ideal option for me and what I’ll be going with.

I’d just like to hear opinions if I should also run syncthing on my VPS as well or just on my home PC?