بسم اللہ الرحمن الرحیم

الجواب وباللہ التوفیق

If your mother wants to sell her house without any coercion, and to use that money for your education, she has the optionto do so, and there is no prohibition in Shariah regarding this.

The underlying concern of avoiding usurious debt, is commendable. But selling the house just for the sake of worldly education doesn’t appear to be quite sound. Therefore, it is suggested that you do “Istikharah” and then take action in this regard. 

فقط واللہ اعلم واتم