I am in the process of investigating Medicaid and other method of care for my mother. How will home ownership affect Medicaid?

My mother owns her home outright and its value is less than 300k. Right now I am not too concerned with her house. I am concern with my brother's house. My brother got into a financial bind many years ago but overcame it. He wanted to buy a home but his credit was not good. My mother and father (father passed) took out a mortgage in their names many years ago. My brother has made all of the mortgage payments since. In 2009 my brother was added to the warrant deed as joint. Mother updated the will recently and the attorney change it to joint with survivorship and going to my brother in the will. How will this affect, if any, the assets for Medicaid in Florida?