I need to loose 70 pounds in 7 months. Will this work?

It all depends on your body and its metabolism. My advice would be to start out with this plan, and then adjust it as much as you need each month to get the results you want. Just remember, your health is most important. Take care of your self and don't starve, you'll actually lose more weight by eating regularly. Also, if you are able to I would visit a doctor/dietitian for their advice. Just to make sure you're approaching this in a way that will not only produce results, but keep you healthy.