There's one thing you can guarantee about travel, it requires you to expect and unexpected.
9 hour layover overnight - no problem, simply crash on the floor of the grossly crowded transit lounge. How bad can it be getting only a few hours sleep during a 40 hour journey? Stay in a guest house as part of a stupa/monastery, must be quiet and calm, right? In the middle of Kathmandu, highly unlikely. Electricity, hot water, any water? Possibly. Any ideas of control quickly fall by the wayside. But then again, Nepal, as with other developing countries, is a country full of the unpredictable. Many opportunities to keep you "in the moment", out of the preconceived and the expected.