Our trip went very well. Driver Pawan was particularly pleasant. He explained us various options of sights to visit and was very helpful in our search for the right hotels and restaurants. He kept his appointments all the time.
Eventually we had to shorten our ambitious trip. Although we have not been to Jaisalmer because of it, we were happy that we didn’t have to travel by car any more. It is easy to misjudge the average speed that can be reached.
The flights from Varanasi (through Delhi) to Kathmandu and back to Delhi with SpiceJet went without a hitch.
All in all we have really enjoyed our trip through (some of) India and Nepal.
It goes without saying that I recommend this formula to friends and acquaintances.