I would think carefully about why you want to get them all on the same network, and then find other, application-based ways to accomplish the same thing. For ex

I would think carefully about why you want to get them all on the same network, and then find other, application-based ways to accomplish the same thing. For example if you want to share files, use Dropbox instead of a LAN file share. This will most likely be easier to implement and secure. Consider that cutting edge companies are in the process of basically deprecating their LAN in favor of app-based security. Google "zero trust network" or BeyondCorp. You can build this sort of ecosystem yourself using commercially available products and services. Instead of enterprise single-sign-on, set up family members with a password manager.