Did someone call for a low-tech? Try the following. It’s a test for low-techs.
Then build one of these.
$2K Solar Space + Water Heating — One Simple DIY System
http://www.builditsolar.com/Projects/SpaceHeating/DHWplusSpace/Main.htm
And do an engine or transmission swap and at least one house build (all, including electrical work, plumbing, PV solar power plant, mechanical, etc.—all to codes).
Do those or equivalent projects successfully, and you may enter.
Done all that but the solar. On my house I did not do the flat work, excavating or the tile work, but did all the rest. I did do the lay out and the ground work for the excavating though.