If you're considering self-hosting anything, you might consider using https://www.passwordstore.org/ https://www.passwordstore.org/. Personally, I've used it s

If you're considering self-hosting anything, you might consider using https://www.passwordstore.org/ https://www.passwordstore.org/. Personally, I've used it since lastpass made people pay for multi-device access. You can treat it like a git repo that's encrypted at rest. Client implementations are pretty quality in my window of experience (on linux+ff, mac osx+ff, iOS+safari). The security problem reduces to "how do I securely store a private key that I use every day", which is a well-understood problem with a well-documented set of solutions.