What should my husband do if he wants to lose everything in order to see his father?

His father raised him, and he has the responsibility and obligation to take care of his parents all his life. You are right to take care of his father. If you marry him, you should also take care of this responsibility. If your family is ill, he should also take this responsibility. You can talk to your husband. At least, you should save some money to solve your own food and clothing, and then go to see his father. Otherwise, how can a large family live without blindness? You should support him and don't put pressure on him.