What does it cost for an astronaut to spend an hour outside the ISS, in terms of
- astronaut time
- mission preparation time
- ground support personnel
- space suit "rent" (?)
Does this cost vary for a Russian/European/American cosmo/astronaut?
Regarding cost of space suits, according to this comparison of US and Russian spacesuits (EMU and Orlan respectively), EMUs are returned to Earth every 25 EVAs for refurbishment, whereas Orlans are used 12 times then destroyed (!). For the price of an EMU I have seen quotes between 2 and 12 million USD. No idea how much the return to Earth and refurbishment cost, nor how much an Orlan costs.
As you said, the astro/cosmonauts' time spent in EVA preparation, donning, and doffing, is all time during which they are not "productive", and therefore that has to be taken into account when computing the price per "productive" astronaut work. Any idea how much time these would take?
Finally, do you have any idea how many more people sit on console during EVA compared to a normal situation?