First Impressions

[DragonRider]

It's possible to "host" your own personal LAN server and connect to it. Then your progress will be saved and you'll be able to, effectively, play single player.

It's kind of how some modern multiplayer games create a local LAN server under the hood, when you play singe player.

It should not be hard to do and the server should not take much of your system's resources. If you're interested and need info doing that, ask here or send me a PM. A bit janky of a solution, for sure, but works. I've played that way.