I have been clearing 3 hard raids per week on Tuesdays for about a month. If you run with experienced players, a full clear takes maybe an hour and a half from start to finish, and you can reduce that a bit by saving your totems checkpoint on another character. After that, you're basically done for the week unless you like Trials. Not sure why everyone thinks progressing in Destiny requires an insane time commitment. I played really hard the week the expansion launched to get raid ready, and my first raid clears were marathon sessions, but after that, I mostly just play on Tuesdays.