I do special events and many of the people that are certified are the people that work in Hotels, Restaurants and Event centers.
I have been doing this for years (almost 20). It began through word of mouth. I never had a chance to take a course.
I then helped a friend start a floral business and so I picked up clients from there.
I also am a native of Austin, so having a large clientele that entertain a lot helps.
I suggest you work with an event planner. Get an idea of what the work is like.. It can be hard with young children. I did not start until our daughter was in full time school. There are lots of meetings, lots of site visits and remember most events are during the weekends so it does cut into that free weekend time with your family. Children cannot be dragged along to any of this.
Also holidays are when most people entertain and so Thanksgiving, Christmas, New Years.. are usually months of lots of constant work. That can mean on the actual day of Thanksgiving, Christmas etc..
I have found the vendors I trust that have good work ethics, that can be counted on..The Florists, the caterers, the photographers, the Bakers, rentals.. have proven to me that they are trustworthy, some of the best in town and have good work ethics.
If you can put together a good list of these people you have it made...
Make sure you are quick on your feet at making decisions, putting out fires and can bend to what your clients want. You need to be handy in all of the above, because if something falls through, YOU are the one that has to solve it.
It is exciting and fun, but also a tremendous amount of work.