Things that come to mind when I review your idea are as follows:
1. What are the solid wastes available for re-use in that region?
2. Are there processing plants in the region that can turn the solid waste into usable materials for construction?
3. Is the overhead cost for processing of solid waste into usable building materials going to be feasible for the private sector, or will it need funding from the government, or how might that be done?
Although I think the idea has great merit, it will prove to be a very long involved plan with a lot of research on financially viable options to make it a reasonable reality for a doctorate. Should the topic be more narrow and specific to using a certain solid waste like plastic? Perhaps a different perspective on the thesis creating the action plan needed to gain the industrial leaders of the country to participate in a clean up that will benefit them financially while providing labor and affordable housing in the region. I have provided one link to a blogger that has some interesting things on line. Perhaps use bloggers from India as part of your plan of change for the region. Using the power of the internet to initiate change could be to your benefit in this journey.