Assuming Vitto61 can get permission to try the Demo at the store or knows someone else who has the machine he has an eye on.
I have a computer with these specs: Ryzen 1700x (oc to from 3.4 to 3.7 GHZ), Nvidia GTX 1070 8GB, ASUS Prime B350 A mainboard, 32GB DDR4 RAM.
At some airports like KLGA FPS are only 13-20. At other airports with more animated traffic like RJCC about 24 FPS. The low FPS with KLGA is because it is in a very dense urban area and close to a resource demanding payware airport: KJFK. My settings are high but not extreme. I have shadows on objects enabled, compressed textures on high (slider 2nd notch from right), number of objects on high (2nd notch from right), reflections on low, 1920x1080 resolution.
If you want details similar to mine, I think the machine your looking at would perform quite badly with any texture load.