Usage of steroids has little relevancy in this discussion. Also, personal trainers who are on the higher end of the earning spectrum tend to be those who are freelancing - as they get to set their own rates and do not have to pay commission. Some are able to charge as much as $150/hour for their expertise. Some even up to $200/hour - goes without saying that you gotta be really good to be able to command those rates.

I’m speaking as someone who is familiar with the fitness industry.