Updated after help so far.
Now I only need hotel and restaurant and Airbnb suggestions.
30 nights
20th wedding anniversary
Here it is after the help so far…
fly usa to Rome
Rome 5 nights stay where????
Speed trainRome to Venice
Venice 2 nights stay where????
Train venice to balluno
Belluno 2 nights stay where????
Train Belluno to Venice airport
Fly Venice to Palermo Sicily nonstop Ryan air
Rent car In Palermo
Sicily 7 night (visit friends canacati) stay???
Return car Palermo airport
Fly Palermo to Munich nonstop Lufthansa
Then, Train Munich to Salzberg
Salzberg 2 night stay where????
Train to regensberg
Regenensberg 4 night —- stay where????
Train to kassel
Kassel 7 nights ** airBb booked
Train to frankfurt
**Frankfurt 1 night airport hotel booked
Fly usa