Sports betting is not easy so making a living off of it takes time. You really need lots of discipline and knowledge to really understand where the value is in making your sports picks. If you want to make a living from sports betting, you need to have a high bankroll. If you do not have a very high bankroll, then you can only make additional income from sports betting but probably not enough money on a weekly basis to live off of. That's because you don't bet your whole bankroll in a few bets. You need to look at sports betting as an investment over time.
Another way to make money on sports betting though is to become a sports handicapper. On Picking Duck anyone can make money selling their sports picks. Its just like ebay for selling sports picks. Make picks on the site and your win% is tracked. This will let you know if you are any good without risking any money. If you are good, then start selling your picks. People will buy your picks if you are on a hot streak!