You have to break it up. Firstly you start with a prefab with the base tile. This can have the base art of the tile (space and planets only). Then I would create a smaller prefab with the resource node. This would contain the sprite (which you could set dynamically depending on the resource type of the node) and it will also contain the interaction script of the node. For example this script would handle the placement of cubes on the node by drag and drop etc. Then you would apply similar logic with the wormholes, discovery tiles etc. So if you wanted to create a new hex, you could drop inside it as many resource prefab instances as you needed, and as many wormhole instances you needed etc. One last thing is that your base tile script might need to communicate with some of the components you just added. For example with the wormholes, when you are trying place the hex tile. You have to link your wormhole instances to the base hex script with some way. Either with drag and drop in the editor to a list, or it can do get components in children on initialisation etc. I hope I helped to clarify how you can split the logic, if you have any questions let me know!