The best personal trainers are one's who have built reputations for being able to get results.
They will also have waiting lists... (meaning they only work as much as they want to)
They know how to keep clients if they need to
They also know how to avoid (or get rid of) clients if necessary
If it took them ISSA, ACE, ACSM (whateva) certs and a CPR and an AED card to get to that point, so be it.
Personal training is nothing more than a job. It can suck just as much or more than any other job.
If you really want to make money, become a registered dietician and start working with the clinically/morbidly obese. Great money, paid by insurance companies.... but who can handle it?
Some of you fags would probably look forward to 300 lbs of chewed bubblegum everyday.