I'm not sure what you have in mind here, but my brother did an "owner build" in the true sense of the word and sunk every nail into every piece of wood, every pipe, every wire, every window, floor, staircase, insulation, lighting, built all the cabinets, everything. That was 8 years of his life. Two of those years he literally quit his job and worked on it full time.
Caution, it is easy to seriously underestimate how much work it is to build a house. It could stretch on for years. Not to mention the pain in the ass that is bad weather, the logistics of sourcing and moving all the materials, plans, permits, etc.