yes.. I could
No I would not like to.
At university I did this.. and less sometimes. - its easily possible.
But its not a great way to live in general, and I eat so much better now I have more money..
Main difference to be hoenst is meat.
When I was living on less then £20 a week, meat really is hard to come by.. and is the main sacrfice..
Now though I can get a lovely peice of meat for each night, some for my lunches etc. and its just lovely