Greetings John and welcome to Dhammawheel.
I am sorry for the situation that you find yourself in.
Certainly do what you can to assist your family, but whatever you do, be sure to look after yourself. That means, but no means limited to, Dhamma practice. I hope that during this turbulent time it will be your rock and anchor.
Don't be afraid to ask your extended family for assistance. I also recommend that you research (if you haven't already done so) for support groups, networks, and whether there is some available institutional care and government subsidy.
Wishing you all the best,