If you’ve got Tailscale it’ll build WireGuard tunnels directly over the LAN: I actually do this with Samba for Time Machine backups on macOS.
Obviously the big bonus is being able to do the same over the internet without the gaping security holes.
(I used to use split DNS so that my LAN’s router’s DNS server returned the LAN IP, and Tailscale’s DNS server returned the Tailscale IP. But because I’m a privacy geek I decided to make it Tailscale-only.)
I’ve worked at McDonald’s, Burger King, Wendy’s, and Taco John’s and out of all of them McDonald’s has the most efficient systems. As long as management follows the policies it should be easy to run a McDonald’s. Keep in mind this means a lot of stuff is prepared ahead of time: tomatoes, onions, etc. are pre-sliced before it ever reaches the store (Burger King and Wendy’s are more “fresh” in this regard.)
Wendy’s was pretty good too, but Burger King had the worst setup I’ve seen. The restaurants are just not set up for efficiency and it doesn’t take much to start having long wait times.