When do you need an event consultant? That question is best answered by the importance of the event itself, not only to the attendees, but to you. What is the purpose of the event? Will it decide your future? Will it affect your livelihood? The greater the impact of the event on your life, the more important it is to get the details right.
If you have an introduction for a campaign, how much do you really know about focusing the attention of the media on that day? Do you know who reads Luxury Las Vegas, and how to use the demographics associated with it? Have you priced special invitation dinners, and do you know who offers the latest trend and most exclusive venue?
If your event lasts all day, are the people who are there at 6 am going to be there when the last customer walks out the door at 7 in the evening? And perhaps most importantly, do you even have time to worry about it? Much of the time, when you are staging an event the star of the show is you.
"A well-designed and well-orchestrated event is analogous to a good stage production. It's all about getting your act together and performing the right show for the right audience."
One is often able to deal with the "when" and "why" aspects of an event, but the "where" and "how" parts can get a bit tricky. You have a budget that you have to honor. You have a purpose to fulfill. You have to publicize it, and meet expectations.
You have to know how to conceptualize a theme, where to buy the Kobe beef, how to leave them smiling, and where to present your event for the biggest impact on your target group. Where do you go to hire temporary waiting staff, and what is the best price for oysters? Do you need an investment analyst? A ballet dancer? A string quartet?
If this event will affect the public's conception of your endeavor, then what you need is an event consultant.