The sweet spot in writing has always been speechwriting. That's because we in the craft can charge premium fees since what we put together must fit the speaker perfectly. After a recesssion in our industry, demand is back and growing. There is no one fee schedule. But for a client in a large organization, the billing is about $100 a minute for delivered text.
So, how do you break into this niche? Like most other niches in providing content, you are your portfolio of samples. That means job number-one is to get samples. Often the quickest way to do that is to volunteer your services to politicos, small businesspeople invited to give a talk at the Rotary, professional services managers who put on seminars, members of the Millennial and Matrix generations providing presentations (in all mediums), and God's Plenty who decide to do some talking on video for YouTube. Meanwhile, analyze the speaking tactics of the best, ranging from Jeff Bezos to Bill Clinton. Retrieve and watch TED Talks.
The trick is to reassure your non-paying clients that the content will sound "just like them." It is a difficult lesson to learn but learn it you must that if the speaker is not at-home with the text, it doesn't matter if that text is published later in VITAL SPEECHES OF THE DAY. The delivery will be flawed.
After the portfolio is full of diverse samples, then you can look for a full-time job in speechwriting or hang out a shingle. Those jobs are listed in the EXECUTIVE COMMUNICATIONS NEWSLETTER (sign up by contacting David Murray firstname.lastname@example.org). You can also spot them in the jobs section of Mediabistro.com, Journalismjobs.com, and Odwyerpr.com. To pitch your services, as "What Color Is Your Parachute?" recommends, direct mail is best.
The better you get at fitting remarks to the speaker the better the jobs or assignments you will get.