There are only a few services I host that are publicly accesible, and I put those on a 12 dollar per year virmach vps. One of those is vaultwarden. Some others are gotify, wallabag, hauk, and remotely. I don’t think it’s a problem to run vaultwarden on your lan only because it will sync changes when you connect and resolve any conflicts. I have it accessible from the internet to encourage friends and family to use a password manager with as few hurdles as possible. I’ve found it to be easy to administrate and secure. In fact, I just moved it from my cancelled dedipath vps to my virmach vps yesterday with zero issues and about 5 minutes of downtime.