Cooking yourself/cooking by yourself/other option?
Are the next sentences correct or should it be something another?
You can save money by cooking yourself.
You can save money by cooking by yourself

Question

Cooking yourself/cooking by yourself/other option?
Are the next sentences correct or should it be something another?
You can save money by cooking yourself. 
You can save money by cooking by yourself

Answer

Cooking for yourself is more clear, although most people understand what your two sentences mean.