My approach is to create a house for $300 which is roomy and liveable and safer and better for health and well being by providing communally the kitchen toilet and bathroon facilities. .
Obviously some functions of a house -- must be done -- in the house � the family living and sleeping spaces -- spaces that are about family, togetherness, sleeping, security, privacy, and intimacy. But some functions of the house can be provided on a communal basis, without severely lessening the total "home" experience for the residents � in this case the food preparation/main dining and bathroom and toilet facilities.
Given their budget, as well as the imagined circumstances of the residents, the potential for serious problems to develop if such a group is not managed carefully, it is possibly better that some functions, critically important to the welfare of the whole group, are provided and managed communally. For example, it is essential that clean water, well prepared food and high levels of personal and environmental hygiene be provided. It is desirable that things like electricity and fires for cooking are restricted/controlled or provided communally.
I believe this could be "sold" to the residents and they will become positively engaged with the sentiments and practice -- especially when they experience the results.
I use re-cycled shipping containers as heavyweight anchors for 3 taught steel wire ropes which provide the main structural elements along with strategically placed (low-load-bearing) simple height maintaining props.
Over the (3) support wires, specially designed, locally made, standard panels � such as; plain wall/roof panel, door/roof panel, window/roof panel, ventilation/roof panel and end-wall panels -- are draped and joined. The panels can be selected to provide accommodation for different sized families. The joined � and waterproofed � panels combine to make a tent-house -- with a gabled roof, end walls, screened doorway and a rubber floor.
Each of the anchoring containers is simply modified to house the communal bathrooms/toilets, or food preparation and or/other functions required for the residents of the houses.