Where to find out about available building materials in various countries

I would like some suggestions on how I might go about identifying available building materials in various countries. I have. at one time or another, posted threads ranging from where to find sprayfoam insulation to engineered wood products, to bricks and brick-making machines, to recycled steel products, etc.

What I would like to find is some sort of "clearing house" site that could tell me, for example, "There are large quantities of material to make cement or bricks in Zimbabwe, but no wood for framing or metal for rebar"--I'm seeking to organize a non-profit group that will work with various entities in developing nations to secure deeded property--this property will be given to inhabitants of what we are calling "Electric Villages"--these are intended to be small communities with ten habitats, plus one or two "community use" structures--the habitats are configured for families of six [two parents, up to four children] and will be self-contained in that each "village" will have a solar-powered generator for electricity, a device that will extract potable water by manipulating the dew point, incinerating toilets to deal with waste and conserve water. While toying with a design for a "house", and messing about with sprayfoam insulations and engineered wood products, I finally hit on the idea that it would be good to find out what may already be available "on site" to use in this project, rather than get all complicated and have to import materials--further, the concept involves getting the people who will actually use these structures to help build them, so the idea is to make things so that a person with few skills/experience in the "building trades" could still assemble their house [or a couple of people at minimum] in the space of 48 hours or less.

The grandiose idea I'm handed is "It has to look like a house, work like a house, have at least 400s.f. and cost $500 or less in materials"--another way to put is, for every $10,000 donated to our .org we can equip a "village", including basic amenities, but most importantly with a solar-powered generator that provides 1.5kW per structure [with extra for harvesting water], plus supporting micro-loans and providing tools to help develop economic and educational opportunities--and by securing land that may be deeded to the inhabitants, it [hopefully] provides further incentive and means for persons/families to enter into the wider economic world--once people are able to rise above subsistance conditions they may actually become consumers themselves.

Not that this all altruism--people who are educated, with a means to have a comfortable, productive lifestyle [maybe] don't feel they need to blow themselves up, along with those they feel oppress them.