These numbers aren't believable. There's no way to consistently make $1k on every $3k wagered. Possibly for weeks, or even a couple of months. But there is no method of betting on professional sports that can do that over any significant time period.

If you got to the point of betting $30k a day, you were definitely going to get limited by the sports books. They also can and will arbitrarily limit the amount of money that you can withdraw. Sports books are really only designed to deal in that much money with a limited set of people who exhibit very clear patterns.