The cost would be insane. And it wouldn’t be near 30min, you’d need lots of teams to reach this, driving the cost further up. Need to rotate them on a regular basis. And soldier without gravity for months at a time are definitely not fit for combat.

> The cost would be insane.

Yeah, that's why it'd be a good way for SpaceX to make money.

But it doesn't make sense for the marines. For the same money you could spin up a bunch more QRFs and scatter them over the globe.