Mark position of spawnpoints in editor - unity3d

Question

I am creating a digital boardgame, which consits of muliple boards, between which the gamepieces are moved by the players.
The script of the game board needs a 2D array of positions to know where to move a gamepiece when it recives one.
Currently to mark the positions on the game boards, I added placeholder gameobjects to the prefab and named them "spawnpoint\d".In the Awake() method I use Transform.Find() to search for those gameobjects. Then, after I save their positions I call Destroy() on them, so they do not show up in the game.
I see two problems:
This is done for all Instantiated game board, altough the positions are the same on all of them.
I read that using Transform.Find() is heavily discourged by the experts in the community.
I wish to store the spawnpoint positions in a static array, so all instances refer to the same data. Furthermore I wish to easily modify these positions in the editor with visual help.
I tried serializing static members, but those do not show up in the editor to be able to modify.
[SerializeField]
public static int TestNumber;
TLDR:
How to make static members visually changeable from the Unity editor?

Answer 1

tl;dr you can't, static fields are not serialized.
You can do e.g.
[SerializeField] private Transform[] spawnPoints;
public static Transform[] SpawnPoints;
private void Awake ()
{
SpawnPoints = spawnPoints;
}
In general I would suggest rather using something like this:
// Simply attach this class to each GameObject that shall be a spawn point
// MAKE SURE IT IS ACTIVE AND ENABLED BY DEFAULT
public class SpawnPoint : MonoBehaviour
{
// Each SpawnPoint (un)registers itself here
private static readonly HasSet<SpawnPoint> _instances = new HashSet<SpawnPoint>();
// For the public return a new HashSet to make sure nobody can modify the
// original _instances from the outside
public static HashSet<SpawnPoint>() Instances => new HashSet<SpawnPoint>(_instancea);
private void Awake()
{
// Register yourself to the existing instances
_instances.Add(this);
// Optional: make sure this object is not destroyed when a new scene is loaded
DontDestroyOnLoad (gameObject);
// simply hide the entire gameObject
gameObject.SetActive(false);
}
private void Destroy ()
{
// Unregister yourself from the instances
_instances.Remove(this);
}
}
This way
each spawn point Auto-Registers itself to the Instances so you don't even need to serialize this via the Inspector -> you also can't forget any
the spawn points don't get Destroyed when a new scene is loaded (if you use the DontDestroyOnLoad - otherwise they are destroyed and auto-removed from the instances)
you disable the objects (though actually if they have nothing attached except this script it wouldn't matter anyway)
you can easily access all the spawn points without using expensive stuff like Find or FindObjectsOfType but rather simply via the property
var availableSpawnPoints = SpawnPoint.Instances;