Custom Editor for waypoint system with branches

Hey, Im trying to script a custom editor for a waypoint system.
I want the waypoint system to work like this: I have a node, the node has a starting position and a list of possible branches. The branches are again all nodes. So this is how it would look very simple:

Code (csharp):

1.  
2. public class PathManager : MonoBehaviour {
3.  
4.     public Node[] paths;
5.  
6.     [System.Serializable]
7.     public class Node
8.     {
9.         public Vector3 position;
10.         public Node[] branches;
11.     }
12. }
13.  

This will cause a depth error in the unity editor because I use a list of nodes in the node class.
I want to build something very simple with handles. To connect nodes and let them branch off directly in the editor.
Can somebody point me in a direction on how to solve my problem?

Thanks