well just think, i did 7 navexs after GFPT, plus a couple of Sup-NAVs coz of somethings i didnt get the first time. Got GFPT around 30 hours and then PPL flight test at around 65 hours, but take out the occasional pax carrying trips buzzing round in the Training Area, so around 30 hours.
So depending on how well you learn things and the quality of instructing. Unfortunately, my instructor was not up to standard which i only found out during my flight test which i had to redo.