I've never seen a tracker in Harmondale. Explorer, perhaps, not sure. You can hire only the lowest level professions there. You are stating that the travel shortening professions stack. I am not sure again.But it does not matter. Your 4 days plus 7 days to Harmondale is 11 days again. You have no time for completing your quests. You need to complete many quests.
Also, "speedgames" aren't counter-productive
It's a bit different game but it's still a CRPG - you need to plan your actions, you need to develop your characters but your resources (time) are severely restricted. You are going to win anyway 