Are each of these things a prefab? Scene Graph is pretty powerful and good for this kind of situation. If you have a single “tile”, wall", “floor”, etc as a prefab, you just edit it once and drag it into your game. If you want to make a change, you just edit the prefab instead of each instance. In your code you can use the API’s I mentioned above to grab them in bulk without having to go through the hassle of figuring out editables.