Many YouTube creators use trainers to build massive, aesthetically perfect fortresses without waiting for resources. They turn on unlimited gold + instant construction, pause the enemy AI (some trainers have an "AI freeze" function), and spend hours crafting a cinematic siege.
If the trainer does not work:
Worried about your granary being full or your armory empty? The trainer freezes resource counts. Even if you have 0 iron, you can still produce 10,000 Arab swordsmen.