Want to make a living at horse training. Fact, not many make it. Those that do are usually good at multiple disciplines,ie, QH, Arab, TWH, Racking. And good with all. You almost have to show, and show a lot. Exposure is normally the greatest at the shows. AND, you have win, and win big. You'll have to adopt a lot of short cuts, you may not really like. Your trained horses have to be good and develop good, quick.
You live close to some of the best and worst gaited horse trainers in the country. Go visit SW VA. Find out whose winning and why. Then decide if it's something your still interested in making a career out of. Look at where the money they spend is coming from, ie, from training or some other business. If your good, you'll be competing with trainers, that could care less if they make any money at it, they have money from other sources, it's a hobby to them. You'll find the trainers that are successful are usually very closed mouth about how they train. These are the trainers you'll need to get to know and learn their ways.
Not that you can not make it, but it's a tough business. The certifications are mostly a waste of money. It's how quick you can make a good horse, win. Do avoid the mediocre to fair horses for training. Avoid the problem horses. They take too much time and will not reward your efforts like a good horse. To be successful you HAVE To HAVE a barn full of winners.
To succeed, you may have do shoeing, or horse trading or horse transporting. If you have enough horses close by, the combination of shoeing, training and showing is probably one of your better bets. Do your shoeing in your facility not a good idea to start spending all of your time traveling.
AND, remember, horse are cheap, BUT well trained, winning horses, still command a good price. To start, you need to sell a few high dollar horses, ie, over $20k each. The word of mouth from these sales is excellent advertising.