Put "Hospice care Miami" into Google and hit search. I just did and there were quite a few. Then pick up the phone and start calling. I don't think this site will allow me to put all of the information on all of the sites here, but it's an easy search.
Some charge for their services, some are non-profit, some are covered by insurance and most will take Medicaid and Medicare depending on what the state has okayed.
They have the answers to help you and your sister. They also monitor the pain drugs and such that are so essential at this time.
Please let me know what you find out and if you're able to get help. If not, I'll try to do what I can from here. I know a couple of people in the Miami area and though this type of thing is not their "strong suit" someone may have experience that I don't know about yet.
My best to you and hang in there.