Hi Romana,
I don’t know what to say, I have been touched by what you have written in your post, I have a gambling addiction and I am in recovery, but there are few points that I need to comment on:
1: you shouldn’t gamble with him, don’t take this activity in easy.
2: limiting the amount to gamble to 5% or 100$ or any other number, didn’t work with anyone I know and will not work. we all tried it simply it will not work. he has to stop completely. if he lapsed or relapsed during that it is a different story but the objective should be to stop all gambling activities.
I will stop here because I think I am not the correct person to give you advice because I am addicted to gambling you need and advice from someone from the other side the spouse or family side.