As reported by the BBC, a 52-year-old software engineer in Scotland has built a wood and straw-bale house for a total of UK£ 4,000 (equals 8,054 US-$). Talk about affordable housing. You can see a break-down of all costs on the BBC website. Somehow reminds me of another guy from Massachusetts. He got it done with 28.12½ US-$, though.