When I learned to fly I spent around $450 in the first year. Of course, in those days a DHC1 Chipmunk cost £4/10/- per hour, dual ($9/hour), so I guess around 50 hours per year sounds about right!
The Piper PA-22 Tri Pacer and the new, all metal aerobatic Victor Airtourer with a whole 100 horse power up front was only for rich kids!