It's pretty easy to do the math on Bestseller Campaigns. If you assume a cost of $2,700 and a profit on each book of $5, you'll need to sell 450 books to break even. (That's if you do the campaign yourself after taking the classes; if the consultant does it for you, it costs $15,000.)
The bigger question is, could your time and money be better spent sparking real word of mouth for your book?
If it's important to have a stellar Amazon Sales Rank for a day, you can do it much faster and cheaper by simply buying a few hundred copies of your book from Amazon yourself. Have a copy shipped to each member of your high-school class, your neighbors and in-laws, and every newspaper and magazine editor in your region. That would spark some _real _ word of mouth for your book.
Beating people over the head isn't going to create demand for your book. Instead, create a way for readers to find you on their own_. That's_ when you'll have an audience, and that's what this book is all about.