Is it normal to drink an entire bottle of wine every night by yourself? He tries to come across as some sort of connaisseur in an attempt to hide, what, to me, is just alcoholism. Those wines he drinks also are all on the upper end in terms of alcohol content. I mean, he admitted to having ordered stuff off Amazon he didn't remember because he was so drunk.
Also, the bottle he showed yesterday that was £35 isn't that much more expensive than the 'regular' ones he drinks, they're still £24. Now if he 'only' drinks 20 nights per month (which I doubt if you've seen the amounts he bought last week for just himself) that still comes up to almost £500 per month on booze.