It is better to spend money according to plan. The money you spent on your mother's treatment is very expensive after all. This thought of yours and the effort of your words will give you peace above all else. Also, what you have done is the right way, inshallah. God will somehow return that wealth to you. Because you spent this wealth on your mother. You are very caring towards your mother. What I was when I was a child My mother may not be alive today. But your words make me follow my mother's words.