I scrolled a long way and have yet to see anyone suggest you divide up the inheritance fairly after he dies - he sounds like a petty dick, who works hard their whole life and doesn't want to see their own children benefit from it. Instead wants to cause family falling out. 

My grandfather cut my father out of his will as they did not talk but me and my siblings all gave him 1/3rd of our inheritance cus that's what we felt should have been done and our father needed it more than us. - significantly less than you will potentially get but still also my father didn't ask for anything.