Spaceships: Getting rid of cabins

[Schilcote]

I have a spaceship (which I already designed in non-game-mechanic terms) that I'm trying to recreate in Spaceships terms. Problem is, it's a big honkin' cargo freighter, so it's SM+12... but it's only supposed to have 12 crew quarters (and those aren't even full, it's just got the players in it). Since the 'habitat' component contains 600 cabins, this is a bit of a problem.

Does anyone have a different way of representing crew quarters that doesn't conflict so much with the established design? I suppose I could fill it with minifacs, saying they represent a big workshop that isn't quite big enough to count as 1/6th of a hull section.