Three-four-five caravan

The reason this is a caravan or trailer is that it would be movable. This is more about minimising the size of a dwelling.

The furniture in this living room is deliberately not parallel to the walls as it makes it seem more spacious and provides storage space for our clutter. On the other hand, the contents of every shed and caravan i've seen is rectilinearly arranged. This is sensible in a way, because it maximises use of the room, but it also means that tall people have less space if they lie down in them, for example. They could, however, be smaller.

Imagine a caravan or mobile home whose diagonal is two metres long. Considering this as the hypotenuse of a three-four-five triangle means this need only have an interior sixteen by twelve decimetres. If this is realised as a padded floor which can be used as a mattress, the minimum floor space required for this home could be less than two square metres.

However, this is still not the minimum possible size of dwelling for someone two metres in height, because the mattress could stretch between opposite vertices. This reduces the size of the interior to something like eight and a half decimetres height and width and thirteen in length. I admit to being confused about this though - it sounds wrong.

Clearly it would not be practical to sleep in a bed sloping from top to bottom. Therefore, the dwelling could be stored flat on the ground but jacked up at night for sleeping purposes so that the bed would be in a horizontal position stretching across the interior, allowing it to be parked or otherwise stored in a smaller external space. Also, the mattress itself, along with many other of the facilities, such as those for washing and cooking, could fold away into the walls, ceiling and floor to save room.

This room is about three hundred and sixty centimetres horizontally in each direction and two hundred and seventy centimetres high, which is enough for about two dozen such capsules to be stored. By contrast, only nine ordinary rectilinear capsules two by one by one metres could be stored in the same space.

It also occurs to me rather vaguely that this diagonal method of storage could be applied to other items within the room, so that as the appropriate facility is used, the capsule is tilted at a different angle.

Should it be necessary to tilt the capsule/caravan/shed/whatever for use, a hole can be dug out of the soil, chiselled out of the rock or the vertex can be immersed in water, dug into the sand or propped up between branches, buried in silt, whatever.