Hi Michel,
For the first 2 points, you can consider using “sub” dashboards
To which you can add a link back to the “main" dash f.i.
Point 3: A Google calender howto: Homey Dashboards | Megathread - #365 by Peter_Kawa
But with help from the iCalCalendar app you can show events using notifications, like on a text variable widget, Enhanced Device Widget (example), DataVista app (example).
Point 5: with use of the HERE app, you can create a virtual device showing the travel time and cam image with a map f.i. But you can also use the notification possibilities shown at Point 3.
I use Home Assistant; Howto (and howto install):
