Hey there. I'm not even going to touch the 50 pets thing, but I will tell you that a bite from small to medium colubrids like Corns and Kings is NOTHING compared to the bite of a rodent. Kings and Milks can be nippy, especially if they're younger, but their bite is inconsequential. IF they draw blood, it's tiny little pinpricks, as opposed to whole chunks of flesh being torn off by mice, rats, or rabbits.
Corn Snakes are the best beginner snake, IMHO, but a getula King (California, Eastern, Brooks, Speckled, etc...) isn't a bad choice either.
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Diego
SWCHR