Assuming a below average construction cost of $100 per square foot, $25k would let you build 250 square feet of housing. Not many people would be happy with tha

Assuming a below average construction cost of $100 per square foot, $25k would let you build 250 square feet of housing. Not many people would be happy with that amount of space, and that doesn't leave any money for land acquisition, constructing any of the other infrastructure needed to support the house, or constructing the rail transportation.