Brochure / Magazine Directory Book Design

We are preparing a brochure or a booklet or directory magazine that will contain a directory of businesses. It will be an A5 size and will contain 36 pages. All the pages except the front page will be available to sell to businesses. A page will be split into four boxes; but we will sell as quarter page (one box) - half page (2 boxes) and full page (four boxes). We are creating a sample at the moment, so we need complete designs. But instead of business arts; we will need placeholders that will show case the price. The magazine should still contain all 36 pages. The attached is a word sketch just to show the idea. I need a fantastic world class design for the magazine directory. I will provide some art work for some sample businesses for some of the pages and in some cases, you will need to do the art work too.