TO GET to level 60 woodcutting, it can EASILY be done in a day, i have trained my attack to 60 on Goblins in less than 24 hrs, and Got to 41 woodcutting in about 3, so it would probably take around 18(ish) hours to get to 60 WC. Though It's possible I miscalculated this, I don't think it should take super long to get to 60.