Trying to group markers and display entities

I'm creating a crafting station, and grouping all the enities associated with it would be really useful. For example, when you destroy it, you could kill all the entities associated with it. I thought about using passengers, but markers (which is the primary part of my crafting station) can't have passengers. I also tried with UUID but its just horrible to use if I can any other way it would be pretty cool. Any idea ?