We don't need a house right now, we need food, scrap it and sell it.

Some years later: Alright now that food security has improved lets buy a house. Sorry most construction companies got put out of business by Humanitarian Builder Inc. and they just closed shop cos funding ran out. Contractors aren't building permanent businesses.

If the recipients could only afford a traditional mud + thatch home, the contractors building work was new additional demand, rather than competition against existing builders.

Even when first-world funding dries up, knowledge of the design, its features and benefits will remain. It's also cheaper than the alternative single-storey concrete home design, so perhaps generating new construction demand from people who couldn't quite afford the more expensive single-storey stone house but can afford this new design.

It's certainly an eye-opening unusual project, but I think it's a net gain for the region, even without a sustained/permanent first-world benefactor.