As usual I will divide into casino games and skill games. For casino games, as they are going to be punctual cases of leaving the casino with more money than you enter, you can spend the money on consumption, leisure or something you don't need. The basic needs must be covered before going to the casino. For skill games, if you are able to obtain regular profits, these are going to be a part of your income or even your only income if you are a professional, you have to integrate them in your budget and from there plan your expenses. As they are going to be irregular you should be able to estimate an average and have about 6 months of expenses saved to withstand bad streaks.