ThinkPad P15 Workstation Gen 2

A p15 runs about $4k+. A lenovo zbook refurb runs about $1200. If you see less, be wary. That's the cheapest thing for CAD that meets those specs. If by cheap you mean something less than that, there are none. At least not new, refurbished in good condition or really vaguely cheap. These are mobile

A “P15 with i9” is a Lenovo ThinkPad P15 workstation - powerful, expensive when new, but great for CAD because it comes with professional GPUs (NVIDIA Quadro/T-series), ECC-capable RAM, and strong cooling. You can find older generations refurbished for a fraction of the price, and they still handle