One of the things I would be most worried about in terms of the alcohol and his heart would be that excessive alcohol can cause a weakened heart muscle and if his heart is weak (ejection is lower than 50%) then he needs to totally abstain from alcohol in order that he gives his heart the best chance of improving. Even if you disregard the heart, that amount of alcohol can cause long-term liver problems so he may trade one illness for another. I think you are right on to be concerned.