It's pretty hard to give a direct answer to this. The time commitment we expect of you would probably average to around one hour per day, but the actual workload may differ wildly. For example, if a big update is released, we typically have a team of people spending quite a bit more than that, so that we can release the guide that much sooner. If the people involved want to take it a little bit easier afterwards, nobody will complain about that, of course. Also, if you're willing to put in more hours because you're actually enjoying a certain project, nobody will stop you obviously :) Also, we understand that real-life still takes priority. If you have to take a few weeks off due to vacation, exams or other events, that's no problem at all. While we expect you to invest some time into crew-work, at the end of the day it should remain a hobby, something you can enjoy in your off-time.