I am half convinced you can build a successful cyber security business putting a box in a network that does absolutely nothing. I think there's a requirement to at least show a blinking led and have a, not necessarily patched, cable plugged in. But that's about it.

My thinking is, that if you show a cool enough interface (not connected to the box), with lots of widgets and stats, and they don't detect a hack in the time span of 2 years, you can probably walk away with pretty penny! If they do get hacked, just pretend you technically _did_ see the alert, but a junior employee on your side failed to act on it. Sack them, and then re-hire them later. They are the 'fall' person whose job is basically getting fired. Give your customer a discount and try to stay on for 2 more years!