Logo, letterhead and powerpoint templates

I need help creating a logo, letterhead, and PowerPoint templates for my Energy Consultancy business! These materials are going to be primarily used for business presentations, so it's important that the design and logo capture the essence of my business. I have a rough idea in mind, but am open to any suggestions that you may have. It is important that all three elements work well together. I am looking to have this project completed within a month.