If you're an industry expert, write the book yourself, then pay a professional editor. Get in touch with an editor prior to writing; chances are good they'll have some great tips. You may even be able to find an editor who specializes in your particular industry.
How Do I Develop a Budget?
Your budget should include the services of a professional editor and a professional cover designer. While a few thousand dollars to $10,000 may seem like a lot, if you're releasing a useful book, people will buy it and you may make that money back. Very few marketing tools offer that benefit.
What About the Cover?
Authors who self-publish often insist that it makes financial sense to invest in a good cover and layout design to sell your book, since this first impression usually sways a buyer. Hiring a decent designer will generally set you back $500 to $2000. If you don't do that, you'll have to lay out the book according to the CreateSpace requirements.
A book will cost time and dollars, just like any other marketing effort. If you're in an industry where knowledge is your capital--such as real estate, law, or finance--a book can increase your credibility. It also makes a great handout to clients. That one-time investment can continue paying out for years to come.
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