I went to community college and got an associate's degree in exercise science. I decided this was enough for what I wanted to do. I am certified through ACE as well. It is my dream to own a gym and my husband is very supportive. Probably in three years we will be doing that. The cost of certification is not too bad. $175 approximately I think. The textbook to study for the test is pretty essential if you have not had any college courses in exercise physiology, anatomy, etc. I found the test long but doable although I had been in school for a while before taking it. Just study and you will do fine. My advice is to just immerse yourself with as much useful information as possible. Learn about many different exercise formats. That means doing them, not just reading about them. Try to learn protocol for post-rehabilitation exercises as many will come to you with knee, lower back, and a lot of other problems. It really isn't hard to locate the information. you just have to want to learn. As long as you take that seriously you will be ethical and professional. In contrast, there are too many young trainers out there who look good, do their own workouts, but are not knowledgeable about overall exercise and nutrition. I think you know what I mean. I also highly encourage people to go to a fitness conference. this is a good reality check. You go to the different classes and you may find that you're already on the right track and know a lot of the info that is being dispensed. Or you may find there's a lot you need to know. I also encourage getting a friend or two to train for free. This really helps you sort of get your feet wet with very little pressure.
I hope this helps. Let me know. Cyndie