Racking up 30,000 drunks would take more than 82 years, assuming you were drunk every day of your life. So at that time he would have had to have two drunks every day of his life to claim 30,000.
Similarly, 1500 pieces of ass would take more than 4 years to conquer, assuming, again, one a day. One a week (more do-able, and allowing time to type, but still way beyond his scope) would take 29 years.
8 books in 46 years is right.
So maybe he was just bad at math when the numbers got too large.