Hey guys, I need some advice. I just graduated n started to work. I planned to buy a property using money inherited from my grandparents.

Will I get troubles? Because the property is more than my current salary able to afford if without the money inherited. How do I proved that my money is inhereted? Because when my grandparent go to a better place, the money is cash.. (u know old people dun trust the bank).. not from bank account.. so cannot track?

Thanks in advances.