An anonymous reader writes "I'm starting a project that I hope that the engineers, makers and general DIYers in the Slashdot crowd can help out with. The full story's on the website, but the short version is as follows: my aim is to make a cheap, recycled, sustainable building, to document the process fully and to release anything that would help others to do the same. I intend to use an old train carriage as the shell, but the ideas should extend to shipping containers, aeroplane fuselages or anything similar. I know I'm not the first to do this, but I can't see anyone else who's provided a detailed step-by-step account of the build, complete with plans and the rest. Before I start, though, I'm trying to draw on as much collective experience as possible, and to head off mistakes before they happen. My question to Slashdot is simple: what do you think I need to know before I begin?"