I was still working as shop assistant when I designed and built the first prototype of the LumiFold, a 3D Printer designed to be foldable and portable, based on light-curing liquid resin, commercial DLP projectors, and Arduino based electronics.
I launched my first IndieGoGo campaign, and despite the obvious handmade-look, I raised about 14K euros (https://www.indiegogo.com/projects/lumifold-the-foldable-photo-activated-resin-based-3d-printer).
Then, with the help of my family and friends, proceeded to build them. At home. One by one , by hand, yes. All 50 of them. Cutting all the plastic parts one by one with my CNC machine in the garage! I must have been crazy. But somehow I was able to build and deliver all of them, and save a little money, so it ended up well.