The big guns are used when outside forces (like raiders) make an attempt to raid Dig Site Alpha mostly. The security forces are more for internal danger like trouble-makers. I placed some numbers to get an idea of how many troops they have. Also, i want to keep the corporate idea. NHU is, in essence, a mining corporation aimed for big money. So they don't really expect that entire factions will come around and start shooting them. My initial idea was to, over time, hire more and more mercenaries from a player's faction.

ArenaSnow already agreed about the ore-trading. We discussed it in PM.