I agree with your estimate. Perhaps also add testing costs in there. With that many components one would have to do some some or all of... flying-probe, automa

I agree with your estimate. Perhaps also add testing costs in there. With that many components one would have to do some some or all of... flying-probe, automated optical inspection and functional testing. The testing alone would have significant setup costs in the thousands of dollars, that get small when amortized over MANY units (but I seriously doubt there will be more than a few made of these!). Given that this is an actual CPU, functional test is going to be fairly complex. Really glad that someone has taken the time to do this project, it is effectively a work of art or an interesting discussion piece.