How to purchase house with non arm severely delinquent loan

[Christina Crisostomo]

Hi there, I'm running out of options and need help from all of you. 

Mom got house in CA worth 1M. They owe 570k  It's is severely delinquent. She is not on the loan only in title. My stepdad who passed away is on the loan and title. Stepdad filed Chapter 13   but was dismissed. Servicing provider of the loan acquired it 2017 and they received relief August 2019 now the property is removed from bankruptcy. Mom wants me to save the house for her and my brother to live there kind of like renting it from me. 

I do not mind doing it because it seems just like straight purchase and because of the equity. But now I am having difficulty getting traditional loan to help me finance. What should I do?