Building Grid Manager


I want to build a simple game, which needs a building grid like in settlers 2. The building grid manager class is easy, I spawn actors for every building option. But where do I spawn the grid manager class. It’s an grid which is only visible for the user, so maybe player controller. I think maybe the game mode, but game mode is for server classes I think.

Or should I make an actor an spawn it in the ue4 editor?