Fanatsy Football will require to log in to the league for a live, real-time draft which usually takes about an hour. Once your team is drafted, you have to set your lineup each week. Many times, this requires you to do nothing (example, early in the season when there are no bye weeks) unless one of your players is injured, in which case you would want to sub them out.
Once your team is drafted, you could easily manage playing by checking in on your team for about 10 minutes per week. That said, often times a team manager will simply fall off and quit managing. That usually brings down the level of fun in the league.
If we can get 12 players that will commit to logging on for the live draft and then keeping up with their team (10 minutes per week), we're good.