OK, this is not a bicycle. Once built, it is still not a bicycle or tricycle.
This is an image for a "mobile, urban homeless shelter". The "hull" is made of a heavy fabric.
This is basically an urban "tank" for the homeless as originally purposed and designed for Chicago and NYC. Outside of the U.S., and in the Gaus of New York City and Chicago, where the casual carry of sidearms is prohibited, this might work since it only needs to stop a baseball bat.
In Texas where the carrying of firearms is accepted by our national/state constitution, this would not work as it has heavy fabric sides. Not quite enough armor.
HOWEVER... as a cycling exercise...
In the "alternative bicycle universe" proffered by this thread, this image offers the interesting idea of building an "armoured" (fabric, visually armoured, think Lord Fisher) or armored (think Panzersonderfahrradwagen) quadracycle. I would wonder if this image and idea would inspire somebody to build a quadracycle designed in which to sleep.
Otherwise, the idea of an HPV "tank" with whatever armor is both deemed feasible to its given mission (defined by the builder) and capable of being moved by human limbs is still interesting.
If merely fabric as a Microwohnwagen (another Bike Forum thread introduced this concept), this is rather possible.
On the other hand, I have been trying to figure out whether or not an NIJ Level IV vehicle would still be able to be human powered.
It is tempting to build a Panzersonderfahrradwagen just to prove that it would be capable of being NIJ Level IV and an HPV.