Theres no guarentee. They will split profits from the fight down the middle 50/50. When you add up UK PPV, German TV, US TV, International TV, Sponsership and the gate they will be taking at least £10mil each.
You're a good man to do that for your family, coz you wouldn't ever be in a fit state to enjoy your money after it. :yep I'm really surprised at how well the PPV seems to be going. No wonder Haye wanted to keep the UK money, fair enough too.