Hi Imran, well done on looking for help.
Can you survive for 3 years on that money plus your income? I don’t know, no here really can tell you either. You could get that free advice from the Citizens Advice bureau or StepCahnge, at least you can look at your options then.
If it means three years living frugally then that will be hard. What reason will you give your wife for that frugality? Trying to keep debts hidden, or having to live like a hermit to clear them has sent many people back to gambling.
Whatever your decisions financially the important thing is that you want to stop gambling. Read the otehr stories here, what things are helping others? What barriers can you put in place? What support can you use?
Keep posting and let us know the steps that you are starting to take.