What a reasonable and useful article! When going vegetarian, I read a lot about how hard it would hit on my pocket. Buckwheat, oats, legumes, boiled potatoes and cabbages are not at all expensive, and stores regularly provide discounts on different kinds of vegetables and fruit, so food variety is quite an affordable thing. Such things as almond milk are costly in my country, but one doesn't have to drink it every day.
And when people complain that they are too poor to afford a gym, I woud only reply: walk as much as you can. Walking is not that hard but it really does help to be healthy and thin.