Can I ask, do you raise your own meat/fish/poultry and grow you own vegetables? I ask this because I spend 8k a month easily on just groceries for myself, daughter, and wife. I do cook (and bake) western food at home.
To add, my monthly electric runs me over 5k a month. Then there's Internet and phone service. One beer a night (35 THB /beer) would be a little over 1k.