Thank you John, Celac for the tips.

John, I am afraid that the price is of great concern... Something around 100CHF would be OK (double room).
The thing is, as I now see how I have to plan the trip, we might not have the time to spend a night in Lugano and will probably have to drive to Bern directly. Bern is a stopping point because of the Paul Klee Zentrum. So, I'm looking for a place to stay there and I found an Ibis hotel nearby (30km) but I would consider also a more expensive one I found in the city...

As for Liechtenstein, I have never been there and am curious to see what it looks like, so I want to spend a night there on my way to Vienna.

Niko, it would be good for us to meet in Potro Heli... I'd be glad to drive down there to have a coffee with you, if only I was in Athens the moment you're in Porto Heli.... but I will be in Verona and Venezia...

Mr Melas (username: blackmelas) lives in Corinth, so he's really not far from Porto Heli... he might be interested in metting you there...