The designers who foolishly saw fit to link item crafting time and difficulty to item/equipment cost to purchase, and then also made the quarterstaff cost zero, saw to that.
Just looked over this section, and realised that the building for clubs and quarterstaves does require a craft check (DC12 and 15 respectively). However, if the check suceeds, then of course the effort took no time at all because of the huge division one can make to the week's effort even if one assumes a '1cp' cost.
I guess a house rule could be limit the TTC to a minimum. If the minimum were 1, then say a D15 check passed at 25 would given @30 minutes to finish. A minimum of 10 instead gives a completion time of 4 1/2 hours.