It's pretty easy to be vegan when you're a poor. I lived on beans, carrots, peanuts, red cabbage and soy milk for about a year and a half. Spent like 10 to 20 euros a week on groceries. Later, when I lived in a house that had a useable kitchen, I mixed it up at started cooking lots o' rice and beans every day.
I still don't buy meat in supermarkets and probably never will (unless I'll allow myself a fancy expensive sausage every once in a while, when I'm back in civilizedland again), but I don't have a problem with ordering it when I'm eating out.