Hon, I'm so sorry for all you're going through. I would suggest that you put him on a small allowance and not give him access to major household funds until he is able to make better decisions.

Do not put off your own medical care, your health is important too! My best friend's parents both had major health problems at the same time. The father had a brain tumor, the mother had breast cancer. She delayed her treatment and ended up passing away as a result.

Good luck!