This bedwars map has working generators operated by redstone and command blocks, and the system is large so it has to be below the main island.

To enter in to the redstone system, you need to find it first. the coordinates down below or you could find a fake mountain that look like this:

The Whole Map is constructed on the main island and it has 8 player island, which make 8 teams. 

Each team island gets two generators and one is gold and one is iron. And they also gets a chest and ender chest, and each island also get a crafting table for crafting armors. Oh I almost forgot to mention, you need to put the beds on top of the two bedrock and when each games starts, players have to also click on the bed to set their spawnpoint.

And thanks to PixelPoly Digital For the Npc shops.

The Npc shops have a pretty descent trades.

And the map also include 4 diamond generator island with 1 diamond generator each. 

And 1 emerald generator island with three flours and each flour with one emerald generator.

Before the game can start, the moderator or admin have to flick or destroy the lever on a repeat command block on top of the emerald generator island to activate the generators.

 And that is it. hope you have fun!