When it comes to self-publishing, one of the first considerations is price. Before you take that leap of faith and start publishing your book, you need to know how much it will cost. I wish I could give you nice round numbers here and now, but I can't. Different books and different publishing methods are open to you, so you need to take all of that into account.
For starters, you must first have a publishing budget. You can consult with a self publishing coach through https://selfpublishingmadeeasynow.com/ to help with your self-publishing process in the beginning. Every business investment must have a budget. And it's a good idea to have a zero-dollar budget, as long as you realize that without any money upfront, you're going to have to do all of the work yourself if you want to self-publish your book for free.
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On the other hand, if you have $100 or more to spend, you can have the luxury of having someone else make a cover for you or paying someone to format your manuscript. This service is helpful because it not only saves you time, but the professionals may be able to do a better job.
So take some time to sit down and calculate your budget before you consider your publishing options. And there are plenty of opportunities to self-publish. Then you need to know what kind of book you are going to publish. Is the book hardcover? Paperback? PDF ebooks? Turn on e-books? All of these different ways of self-publishing cost different amounts of money.