Wishing to live in a separate house while single but his mother disagreeing

Q: I tried to spare some money for building another room for my children, but I could not. Last Ramadan, I asked my mother to let me live separately from my married brother. She said that it is better to do this when I build a separate house. I told her that in this way I would not be able to do this. Within myself I was determined to live separately from my brother hoping that I may be able in the future to build a room for my children, for I know that it is not permissible to let them sleep with their parents and that we should not let boys and girls sleep together. The second question is that my children abandoned Salah (Prayer), though they were with me last year in the Kingdom of Saudi Arabia and we all performed Hajj.I want to ask Your Eminence whether separating from my brother without my mother's permission is a kind of ingratitude towards her and severing the ties of kinship. Please guide me, may Allah reward you with the best!

A: You should be dutiful, kind and compassionate to your mother. (Part No. 25; Page No. 228) There is nothing wrong with living separately in an independent house, if the situation so requires.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.