Way to transfer the property from my mother to myself

Dear Sir, I have a property in Haryana on the name of my mother. My mother got divorced when I was 4 years of age. That period of time, my mother with me stayed with my Nana, Nani rented house. Later in 1985, she purchased a housing property. Then my nana and nani also shifted in that purchased house till 2003. Then I got married and continued living in same house. As allotment of that house was happened in 1985, till 1995, my mother paid all the installments. In 2003, the house got registered on my mother name. We also took a reconstruction property loan against mortgage of this property and settled the same in 2012. I am the only son of my mother. My nana and nani are died few years back. Now issue is that my mother is 100% handicapped and now we are living in Delhi NCR ( all, my mother, wife and my kids). Although the property is on the name of my mother, but in the entire documentation, my nanaji name is reflecting as Mrs. xxxx(my mother name) daughter of Mr. XXX ( my nanaji ). Now my mother is in tension and want to gift the property to my name or create power of attorny or want to create a will so that there should not be any demander in the property because of the same issue mentioned above ( daughter of ). Please suggest what should I do without expending much amount.