If they give you $10,000 per year, then the cost of Alabama would be $10,000 to $24,000 per year to them, which is still less than the cost of CMU. Do you really know that it is not about the money? Do they want you to live at home and commute (a common method of saving money when the college is nearby, although sometimes also desired by parents who do not want to let go of their kids)? Is it full tuition or full ride that you got at Alabama?