That is easy to say, but good luck finding a RTX 2060 at a reasonable price. I have been trying for a month and a half, and almost all graphics cards are not available.
If you are in the US, you can easily buy a prebuilt machine that comes with RTX2060 for $1100-1200. Check Dell/Lenovo or Costco. Buying the card independently is pretty much impossible/uneconomical. If you don't want the rest of it, simply list the remains of the system with as a cheap PC with integrated GPU.
I'd recommend against Dell. A better option would be to purchase a gaming rig and install a flavour of linux on it. There's a video series from LinusMediaGroup that investigated different OEMs, Dell ended up overcharging/scamming them for services they didn't ask for and gave worse performance [1].
I think if someone really needed the performance, they'd be using some much more powerful than the RTX 2060.
However, if your goal is just to have a machine on which you can actually test your CUDA code, then the Zephyris G14 laptop is perfect. It's portable, has a nice screen, etc.
