Nope. Always 2 bases. But that is out of habit from back then when i started and got all my stuff destroyed. Until i figured out how to build functional horde bases it became a habit to build two separate bases. That allows to do experiments, you don´t want to test out things with all your stuff a few blocks away from the horde.
Also when playing MP we have our base mom and we aren´t allowed to have horde night at the home base. 😛