A complete house-kit with outer shell, siding, roofing materials, doors, windows and all fasteners. Can be erected by 2 unskilled people in 2 weeks.
Starts at $17,185
I do not work for Shelter-Kit. I would like to build one in Austin, though.
Look at the Amish - when an Amish couple marries, or needs an extension on a barn, the whole community gets together and builds a structure within days: http://en.wikipedia.org/wiki/Barn_raising
They have a barn out back and a pool of 3 1980's Mercedes 240 Diesels, and they do all the work themselves. The house started as a 120 year old wood-sided cabin, and they built additions to it to make it much larger. (The additions look like they're part of the original, though!)
The wedding was a dance. No wedding cake, just 500 of the most delicious cupcakes, baked by the bride, her mom, and the rest of the family. Party favors were home made jam. Lots of food that was grown by them.
It was "Consume the Minimum, Produce the Maximum" all around. Replace money with knowledge, attention, and time.