I'm not judging him on his lifestyle choice - if that's what makes him happy then more power to him. However, to infer that this is a 'typical' student lifestyle is wholly inaccurate and ludicrous.
All I know is that living a lifestyle like the one he suggests
will make things harder. I wouldn't be friends with him, and I doubt the people I know would be either. I'm not suggesting that the OP doesn't have mates as I'm sure he does, my point is this: when you first go to Uni you have many choices - one of which is the 'crowd' that you want to hang around with.
I firmly believe that the majority of students would not want to be friends with the OP, solely because of lifestyle choice. I'm not saying he's not a nice guy, but when your friends are living a life on beans and bread why would you brag by buying Waitrose quality products. It's smacks of desperation to be considered the 'rich' one.
Sorry, I've rambled