Thanks all.
I think that I will cut some of the places (Munich, Wien and Budapest) off the list and try my best to visit as many places as possible provided that my kids and my wife are ready to move to the next one. For this reason I think my route will be just towards the opposite way (Luxembourg - Lake Como and Lugano - Venice - Croatian Coast line/Plitvitce Natural Park - Mostar/Sarajevo- Bled - Hallstatt Austria- ??? Either directly to Luxembourg or I can see Wien if my schedule allows me to do so.).
Let us see what will happen.