Throw double xenon processors (each with 6 cores and 12 threads= 12 cores and 24 threads)
Than add a GTX 1060 or better and it should run
6 core Xeon processors are cheap and still very powerful.....just look for a old server or workstation with the right pci slots
This costs around 400€ for the workstation and 200€ for the gpu
you know, I use a bottle neck, I have a GTX1060 but not the double Xeons as you know, I already have an i5-2300 which does me well.