Based on what you would spend on a 2018-2020 Carrera S, you can buy a brand new 718 GTS 4.0. You can’t go wrong with either of these choices. If you need a back seat, get the 911. If you don’t need the space, get a 718. The 992 Carrera T and 718 GTS 4.0 are the two most special non-GT cars Porsche currently makes. They will also hold their value well, making trading “up” down the road easier.
Maybe not. But if you have a Macan GTS and GT3, that’s pretty much a God Tier setup.