I would like to become a vegetarian.?

It is much more expensive to buy takeaway food than to cook it yourself. You can do amazing things with microwaves. You will have to think and prepare somethings in advance but once you get the hand of it you should be fine. How about looking in a second hand store for a slow-cooker as with a slow cooker and a microwave you can do AMAZING meals. The slow cooker would save you lots of money in the long run as you can cook beans, meats etc. and the cheaper items cook much better in a slow cooker than expensive cuts.