If you are earning from affiliate programs of casinos, then it could be possible that you will make an average of $100 per day. But if you are a plain gambler targeting $100 per day, I doubt you could make it. Between a gambler and the house, there is not even a fair equation. The house is always a step ahead. Although there are times when you get lucky and win against the house, in the long run, it will always be the house that prevails.
And, of course, casinos are not a place to make a living. They are more of a place to squander money.