Hi codiie,
I would ask yourself, what is the greatest way to demonstrate your love for Dad? The answer that is in your heart is the right answer. It may or may not be what YOU want..only you can be honest with yourself and answer.
I do have experience with this type of situation, but that story I don't think matters for your decision making process.
That said, sorry you and your dad and family have ended up in this spot...we understand. And we'll be here.