You don't need to wait for years before you get your $200 investment back. As soon as you start using renewable energy, you will immediately begin a lifetime of power cost cuts. Aside from cutting more than half of your electric bill, you may even be entitled for payment from your electric company once your meter starts running back because of your use of an alternative energy
Your windmill and solar panels will not just lower electric bill payments. They will also help save the earth for your children by not polluting it or contributing to global warming. This alone should be enough of a reason to justify the initial cost of a home energy instructional kit and the materials for your panel or windmill.