Example of a purpose-built 10m2 sleepout built in eath brick, specifically for one person, and built on a typical Waiheke slope. No kitchen or bath.
At 10 m2, a sleepout does not require a building consent. Today building consents can cost as much as the 10 m2 building - especially if it is a pre-built modular unit delivered on site ready to occupy.
One can image ten to fifty such units built around a large central house that has a single kitchen (and probably a chef, rather than everyone doing their own cooking), a dining hall, a large lounge as well as sanitary and washing facilities.
The image above is an experimental building made of earth brick that is 10m2 in size, specifically designed a solo person. It takes advantage of maximum height. Its "T" shaped buildings cost more, gives a sense of space, especially on slopes where a loft provides the place to sleep.
In such a cluster design, the big house is considered the dwelling, with the sleepouts as part of it. The big house becomes the place of community. It should be close to the sleepouts, and, if allowed, should have covered footpaths to provide rain cover.
One of the Resource Consent challenges in this sort of habitat is the definition of a dwelling as having no more than eight unrelated persons. In the Rural One zone, that would be appropriate for such a design, the Council rules essentially mean a density of 1.6 people per hectare or 2/3rd of a person per acre.