First of all, of course you cannot have an airship that's bigger than the hangar you have to put it in. You have to decide how big an airship you're going to have and then how big a hangar you're going to have. You have to have a hangar.
The price will depend on the airship size, obviously. We have some ideas for how that might be reduced. But as a rule of thumb for airships, they get better as they get bigger. The price is about $1 million per tonne of lift. It's more when they're smaller. As you get bigger, that starts to diminish. But that gives you a rough idea.
A 20-tonne-lift airship might cost around $20 million. By comparison, the Hercules, which has similar lift—the military, the Canadian government, purchased some recently—I believe are about $89 million apiece. It's much more expensive to buy airplanes.
Part of the reason is that an airship isn't pressurized. It's not going 500 miles an hour. It doesn't have jet engines. Most what you have is fabric and the envelope. So it's a less expensive vehicle to begin with, just to build it. And of course it has a similar sort of life, or at least it should have.
In terms of the cost, part of it is this issue of regulations. The first thing you'd be asking me is when we get started. I'd say that it depends. How are we going to get the pilots trained and set up, and when will we get going? That's an uncertainty. We don't know the answer.