djpil, sorry don't agree.
Centaurus is spot on.
Average to solo around 10 hrs by my guess. 7 if doing well.
Average for basic aeros 3hrs or so when done with tail wheel endorsement.
Average for tail wheel endorsement 3 hrs when done with aeros. Hardest thing was finding the right day for crosswinds.
As posted in another thread, I always recommended both to be done together as up to an hour of aeros is a waste of time for a student. Go do 15-20 min tops, come back to the circuit for the rest or their head is left spinning, pardon the pun.