Small update:
I have published my 200 page cookbook with CreateSpace to test the water. The kindle verison has about 150 sales per month ($8/book). After 10 days I have sold 10 books of the printed version ($15/book). I think I can reach 50 sales per month. So CreateSpace is another good income source because you allready have the content and you dont need to invest money. Its a nice bonus income and if you are specialized in the cooking niche like me its an option because the people prefer a printed book if they are in the kitchen. I will also publish my other cookbooks at the end of this month.
Next step is to produce cooking videos and publish them with Create Space. I have no idea if someone will pay for videos on amazon!?! Any experience?