In general, the bike manufacturers can get very good pricing on the components they spec. Therefore you would have a hard time beating their price if you do it yourself. If you are patient, you might be able to do well by buying closeouts and sale items but that will take a very long time. A used bike might be your best bet. Since you appreciate older wood working machines, I suggest you spend some time over at the C and V forum. A top of the line Campy equipped road racer from the 70's or 80's will fit you budget.