So by dual hours I mean the number of dual hours on instruction required to meet the licensing/flight test standard. You need 17 hours of dual instruction, and if you can meet the real flight test standard in 17 hours you are well ahead of any curve I have seen. So quite often the dual number goes up as a result of getting through all the flight exercises to a safe level.
Typically students finish private in 60-70 hours, which makes the 45 number a bit unrealistic.
If you do ppl first and then Cpl you will need to convert your ppl, which is 60 hours minimum I believe, so even if you got it done in 50 hours you now need 110 to obtain the cpl. Everything is deductible but you added 10 hours (or more) to the 100 hour requirement.
R-22 can be a deadly choice, but in my experience the 44 is a great machine and quite safe, the only hurdle for you will be that everything is going the wrong direction from the Cabri
Good luck!!