Two questions

You said restart once a day, One of my friends is considering renting a server. So is this still an issue then as assume no way for him to restart the server or…???

Also we have been using the Single Player/Co-op option to play at the moment with me as the host.

When and if we do swap over to a rented server and import the game saves to it what will happen with their characters or will they too need to import their own save files to keep on with their characters???