I don’t recommend using the kit to create a single player game. The MMO networking aspects are intertwined with almost every area of gameplay. For example, this is how attack is handled: the client sends an RPC to the server saying that it wants to attack, the server checks the attack range and angle and assigns the damage, then multicasts the attack to the client and to everyone around the character.
Things from the current kit that could be useful for a single player game are inventory/equipment, camera controls, targeting and simple auto-attack combat, but stripping the kit of networking wouldn’t be an easy task.
This is a question better directed at Epic - currently the dedicated server can only be built when using the source-built version of UE4.
Thanks! 