I find that eating vegan is not as expensive as eating meat and dairy. I think it depends on your food choices and if you are able to have your own garden, etc. I feel that it is a healthier way to eat for way too many reasons to list here. You will need to research and decide what is healthiest for you.
I have a link for you that contains a lot of great information on vegan eating and other related subjects. I hope you will find some helpful information there.