You are crazy to think you can stay on for 2 years at a time and think that the drugs are going to keep carrying you. 12 weeks max. You are wasting money. I hate to go off cycle too but after 12 weeks i just stop feeling it. Just do a good post cycle therapy keep training take off 8 weeks then go back on. My size and strength hardly decline because i eat and train as if i was on. You are putting way too much thaught on drugs and not enough on just eating properly and training heavy. I wont go into the age thing but you can read all the books you want about AS but if you arent mature enough to know when to CYCLE on and off then you are too young to be using anyway. GH and IGF is not the way to go. You need to be more mature. Sorry but i speak from 18 yrs experience in the gym and many years using AS. Of course everybody is different but that is what works for me and my partners. Plus most importantly your health. You need to think about how long you want to BB you dont want to be having a liver transplant at 40 ending your BB forever.