It’s difficult to decide whether a person should hire a self-made or certified (trained and taught by others) coach, especially to people unfamiliar with the industry. As far as certified coaches go, it is worth noting that certification agents who train people do it, among other things, to make money. Therefore, these coaches receive training that is of very high quality but often standardized and lacking in individual customization. Also, it is often more affordable than hiring a self-made coach.
On the other hand, self-made coaches have the ability to tailor their coaching programs to each individual client, and focus on performance as well as achieving unique goals the clients set for themselves. They will perhaps be able to get you a more personalized return on investment, as well as focus all their energy on your problem.