They always say you shouldn't go into personal training for the money, but I think the reality is that most of us do. And why not? If you're an independent trainer that's booked solid at the industry average, you should be bringing in close to, if not more than, $100K a year.
But having a good amount of money coming in the door is simply a start. Getting all the fancy finance managing software that's readily available to every businessperson out there still isn't enough. Even with these tools, 95% of new businesses go under every year.
What it's really going to take is conquering the funny math and bogus time management going on in most areas of the personal training industry and the small business world today. This is especially important for the new trainer; it's at this stage your training business is the most vulnerable to failure.