How do I convince my mother to turn grandmas house into a duplex?

[Juan David Maldonado]

My mother took over the delinquent tax payments in order to save her childhood home for sentimental reasons. Her idea is to fix it up and live in it ONLY. I do not know why when my sister, father and I show no interest in living or moving back to our hometown. Pretty much everything in the house is broken from A to Z. It is also a bottomless pit of back taxes. She does not want to fix it up to rent it out and make money for all of us. How do I change her mind??? PLEASE HELP

In a perfect world, it is a good property to use the BRRR strategy on and generate income for all of us. It's in an older blue-collar area of my hometown with little to no crime. My hometown has a population of 35,000 with its own major employers and own unique economy.