Objects will not spawn in a 2d game.

I am making a 2d game for my class, admit-ably i am using mostly code from the rogue-like to accomplish this but i am using original sprites, however some of my functions are currently dis-functional, i have basically copied code from the rogue like and edited it to fit my variables, but the objects i wish to spawn will not spawn, this game is supposed to be a TBS style game, and the bases will not spawn,

this is an issue with spawning and not layers btw, i have checked the inspector during play mode, the objects i desire to be created are not even being initialized

below is a copy of my code, the problem areas will be highlighted with comments

using UnityEngine; using System; using System.Collections.Generic; using Random = UnityEngine.Random;

public class BoardManager : MonoBehaviour {

 [Serializable]
 public class Count
 {
     public int maximum;
     public int minimum;
     public Count(int min, int max)
     {
         int maximum = max ;
         int minimum = min;
     }
 }

 public int actions;
 public int Health;
 public int Range;
 public int Movement;
 public int SpawnCost;
 public int Damage;

 public int mountains = Random.Range(100,5000);
 public GameObject PlayerHQ;
 public GameObject EnemyHQ;

 public GameObject[] Mountain;
 public GameObject[] Floortiles;
 public GameObject[] PlayerUnits;
 public GameObject[] EnemyUnits;
 public int rows = Random.Range(50,500);
 public int columns = Random.Range(50,500);

 private Transform BoardHolder;
 private List<Vector3> GridPositions = new List<Vector3>();

 void CreateBoard()
 {
     GridPositions.Clear ();
     for (int x = 1; x < columns - 1; x++) 
     {
         for (int y = 1; y < rows - 1;y++)
         {
             GridPositions.Add(new Vector3 (x,y,0f));
         }
     }


 }
 void setUpBoard()
 {
     BoardHolder = new GameObject ("Board").transform;
     for (int x = - 1; x < columns + 1; x++) 
     {
         for (int y = -1; y < rows + 1 ;y++)
         {
             GameObject toInsantiate = Floortiles[Random.Range(0,Floortiles.Length)];
             if (x == -1 || x == columns || y == -1 || y == rows)
             {
                 toInsantiate = Mountain[Random.Range(0,Mountain.Length)];
                 
             }
             GameObject instance = Instantiate(toInsantiate, new Vector3(x,y,0f), Quaternion.identity) as GameObject;
             instance.transform.SetParent(BoardHolder);
         }
     }
 }
 Vector3 RandomPosition()
 {
     int randomIndex = Random.Range (0, GridPositions.Count);
     Vector3 randomPosition = GridPositions [randomIndex];
     GridPositions.RemoveAt (randomIndex);
     return randomPosition;
 }
 void LayOutRandom(GameObject[] tileArray, int minimum, int maximum)
 {
     int objectCount = Random.Range (minimum, maximum + 1);
     for (int i = 0; i < objectCount; i++) 
     {
         Vector3 randomPosition = RandomPosition();
         GameObject tileChoice = tileArray[Random.Range(0,tileArray.Length)];
         Instantiate (tileChoice, randomPosition , Quaternion.identity);
         
     }
 }
 public void setupScene(int level)
 {
     setUpBoard ();
     CreateBoard ();
             // Similar to the function in the Rogue-like where it randomly spawns walls throughout the map, this function is supposed to do the same, but doesn't even initialize the object.
     LayOutRandom(Mountain,columns, rows);
             //The player and Enemy base will not spawn no matter what I try
     Instantiate(PlayerHQ, new Vector3 (columns - (columns -1),rows - (rows -1), 0f), Quaternion.identity);
     Instantiate(EnemyHQ, new Vector3(columns - 1 , rows - 1, 0f), Quaternion.identity);
 }

}