There once was a congressman that made the statement: "A million here, a couple million there and pretty soon you are up to real money". There are NO insignificant cost when you are told to reduce your budget by 10-20%. Every corner has to cut and polished.
PC CAD workstation cost was actually fairly consistent. In the early years we spent about $10K per station: 5 for software (AutoCAD) and 5 for hardware. Hardware cost have come down dramatically but you can still easily spent $5K on a CAD hardware. The good news is that they are way more capable than they were 30 years ago.