Budgeting for real-money online entertainment means setting a spending limit...

https://city-wiki.win/index.php/What_Is_the_Simplest_Rule_for_Gambling_Money_in_a_Budget%3F

Budgeting for real-money online entertainment means setting a spending limit each month to avoid surprises. Since spending can vary, start with a monthly ceiling you’re comfortable with. Use deposit limits to control how much you add at once