Granted that in a single-player game the entire map is open for any base location. That much is obvious. However, what I have in mind for a base the location is questionable. Here’s why:
My goal is to try and replicate Kaer Morhen from the Witcher 3 video game?!? In fact, the entire theme of my single-player game has Ciri being captured and left in the Exiled Dessert to die on the cross. Granted she could simply jump to another universe… planet if she desired to do so. In my game, however, Ciri with the bracelet on is unable to simply jump away. Therefore, she has to survive in the exiled lands.
With that being said, where would you build such a base in the exiled lands?