I think that one of the best pieces of advice to give to someone who is betting with a low budget is to make single bets and half of your money on that single bet , it'll be good returns with small risks , and if you loose you got the remaining half to compensate .
yes, this is a good practice that he can do after he can win the games. this will be difficult for him because if he can be a winner, he will be attracted to continue the games because he hears something in his ear that still ask to continue and he has another chance to win the money. and if he cannot stop after winning, then he will lose his winning money until he doesn't have any money again.