Hi MK. I like Joanne’s answer! She’s right on. To that I would add – what you need to make (assuming that this question relates to YOU going entering the personal training field).
If this question is being posed as you – the consumer – then I would simply say, call around in your local area to find out what trainers are charging. I would NOT make a trainer hiring decision based solely on price, but would ask each trainer you speak to to give you details on their background, experience and client referrals.
I hope that this helps.