58 sq.' / person ( aprox. 5' X 12' ). Not a lot of space...more than the little tar paper shack some of us once shared
But 12 people would equate to almost 100 sq.' per person with that configuration ...might be a good thing in cold weather provided Kim Chi was not on the menu

Bunks would concentrate the sleeping function adding space for shared living and tasks.
Looking back over the thread I see the site sinjefe posted updated and the shelter has a larger footprint option...the benefit of modularity.