I was engaged last year to an older man who had health problems. I was pretty much willing to do whatever it took--I loved him very much. Objectively, on paper, in a bright light, without rose colored glasses, after the honeymoon was over--I might have thought differently. It is what it is. I do see our entire relationship in a different light--more objectively.
However, I would not marry an active alcoholic, someone with untreated health or mental health issues. If a man will not work on a problem to become as healthy as possible, I will not become involved. I too have health issues and I work to stay as healthy as possible. I expect the same of my future husband.