My mother needs a lawyer to handle my uncle's estate (he is 96). She lives in Mass. and he lives in Florida - does she need a MA or FL lawyer?

My uncle in Florida had set up my mother (75) as durable power of attorney and executor of his will. My uncle is in failing health and leaving everything to my mother (home/cash/ira). My mother lives in Massachusetts and has credit card debt, among other issues - she needs a lawyer to discuss that situation and related questions - does she need a Florida or Massachusetts lawyer? Please advise. thank you