## The Walls of Wealth
In a world of rising instability, security is the ultimate luxury good. This tool models the cost of 'Active Defense' for gated Citadels.
### FAQ
**Q: Why is the per-resident cost so high?**
A: Autonomous defense requires continuous hardware updates and a high-bandwidth satellite uplink. This tool models the 'Threat Surcharge.' As regional instability rises, the 'Drone Swarm Density' must increase to maintain safety, leading to higher monthly fees. Safety isn't a right; it's a tiered subscription.