Quote for tiny house development project in the Caribbean and/or West Africa

I have designed an affordable tiny house intended to collect rainwater and run on solar power, completely independent from any government grid. Greywater from the house can be used to water surrounding greenery and plant life, electricity from the solar panels can be shared and/or siphoned off for other uses, and a composting toilet will produce usable human manure for crops. I intend for the houses to be low cost, movable, and easy to build. The climates of the Caribbean and West Africa are also perfect for the tiny house's applications. If built and deployed properly, I hope that entire, self-sufficient neighborhoods/communities could be erected and placed/moved wherever is most useful. I only have floor plans and some conceptual drawings, however.

I am looking for an architecture and/or real estate development firm that works in the Caribbean, Ghana, or Nigeria to figure out the costs and feasibility of making my project a reality.