The cheaper version is to avoid meat, dairy, egg, fish... any animal proteins. Try eating whole foods plant based foods--it can even beat genetics. There are testimonies in youtube about reversing cancer. 

https://www.youtube.com/watch?v=TE7o4Idfi74

This movie will open your eyes http://www.whatthehealthfilm.com/

For more resources, see www.nutritionfacts.org