Hi BurrMan and thanks a lot for your considerations.
@You : "...For programs like 3dcoat, lumion (render) etc, the quadro seems inadequate..."
Well...I think that with a Pascal Quadro P4000 things should go well enough :)
Anyway...I'm in no hurry and I think I will spent some times in the coming months searching for a optimal and affortable
workstation with a Quadro P4000.
There are many interesting "monsters" out there...