You will never look like BIG RC!!
You cant put a time on it, all depends
on dedication, will power, breaking the pain barrier to the extreme, perfect diet\nutrition, lots of gear, sleep. Master all these over a period of 5yrs and who knows.
Its a 24 hour sport pal.
Its much harder for a white man to shape up than a black man. A black man has twice as many receptor sites than a white man.