Is it possible to make a permanent income through gambling? What is your opinion?
No, it is never possible. You can not make a steady income from gambling because you definitely will not be winning all the time you go to a casino.
For example, you might gamble today with $50 and lose all that money for that day. If you repeat the next day the same amount, you might be able to multiply the money 2x, but you might also lose all that money on the next day. That's how gambling is and therefore should not be handled as an occupation.
Although I have seen a man gambling always and yet taking good care of the financial need of his family. I think that gambling is just what he does, but I am not yet sure that he doesn't have any secret investment that is generating money for him always.