Read between the lines. Decode the riddle. Get spook out!
His/her father would have died from cancer anyway, so I guess she was just being practical. Kdots.
She wished her father was no longer in pain and the well turned it on her.
She wished that her father would die earlier so that the pain he's feeling will be gone and so he can rest in peace.
I think that the 'saving' could be earned when the father die or something along that line.
Winish niyang mamatay na yung tatay niya para mabawasan na yung gastusin nila.
she wished her father died so their savings is not complicated anymore because of her father's medicine and check-ups.