I have no problem with someone building their own camera. Even the tried and true folks had to start somewhere. In fact I am a bit surprised about people's assumption that the OP will be cobbling together a shoe box. As photographers we are craftsman and as people who use BW you folks should immediately understand the desire to create something from beginning to end. I have no idea what level of wood craftsman the OP is but it seems clear that he knows what he is getting into.
It has been a dream of mine, for some time now, to design and build a camera that fits my needs.