I don't know if the EP knows of his diabetes, but fasting might present a serious challenge for your husband. I'm no medical expert, but my EP wanted all sorts of diagnostics before he even met me. He wanted to rule out anything that might confound his efforts or compromise my health even further, and this meant multiple tests and imaging. You MUST ensure his EP knows everything about him.

I am sorry, and you must be frustrated and disappointed, that your husband downplays his alcohol consumption. I would guess it works fully against any efforts by his medical team to improve his chances of living longer. Again, I'm nothing close to a medical professional, but I would bet a lot of money alcohol counselors everywhere would insist to your husband, if asked, that he is an alcoholic. At the very least he is emotionally dependent on it.