Pom pom~
which I believe is 35 hours (talent permitting) to complete, can be reduced by 6 hours for the holder of a PPL(A),
I would suggest that the airplane experience is of little use, if any. I took up rotary training after 20 years of planks, and found that the only skills that transferred were navigation and communication. The machines are much different. In fact, if you train on the R22 like I did and many others, too, airplane habits can be deadly. Instincts in airplane flying have no place in helis. If you want to save time and money, the best you can do is have all the money ready so you can fly often, 3-5 hours per week. I had to pause to replenish the bank account, and my skills atrophied while I wasn't flying. That drives up the cost as you spend extra just to return to your previous skill level.