A vegan home-cooked diet can be very, very inexpensive (and much cheaper compared to a diet of animal products (which are heavily subsidized, and bad for us, animals and the environment).
starch-based (e.g. potatoes, rice, lentils, beans) diet with vegetables
and fruits (and some also take very inexpensive B-12-supplement) is as I
guess you know very inexpensive.
One can even become self-sustained. On 1/10 of an acre one can grow 6000 pounds of plant-based food per year in California.
non-vegan diet is killing humans and other animals (e.g. in droughts
caused by enormous amount of green-house gases), the environment, causes
poverty and starvation:
is anything stopping you from a choosing a vegan diet (and inspire you
friends to do this too) of love, compassion and non-violence. You
already believe in this in your heart.
What do you say?