When you say family, you mean his wife and children or you mean his parents. If a married person is an addicted gambler, I think he is going to affect his wife and will affect his children as well because the children are going to view gambling as a bad thing. They will never see gambling as good thing because the only person they look upto has lost it and the wife might even manipulate them just to save them from following the path of their dad not to become a gambler. As for the finances, the family as a whole are going to be affected because they might even struggle to eat because addiction makes one foolish.
As for a person that is not married, as in a single man might only feel the financial instability, the parent will only feel like they lost a precious person to gambling and that's all except if he is a person that take care of their financial billings and I guess a responsible person will not go beyond his limit to become an addicted gambler, that is even why the casino do warn people to gamble responsibly.
Financially, the impact on gamblers who are married or single will both be very pronounced. maybe for those who are married, there is a wife who can manage the finances. and an addicted gambler will only lose the money he has without having to involve family finances. what gets worse is if the addiction starts to become irresponsible, and the gambler forgets about his family's finances. This impact could trigger family destruction and it would be devastating for the gambler who loses his money and his family.
Drug addiction and gambling are both bad. If we cannot avoid it, at least we can minimize the risk and increase our awareness to stay in control.