I think the key to success is staying ahead of the game and not becoming a trendy trainer who follows whatever is the "coolest thing happening"
If you are educated, and certified with a Nationally Accredited Certification, you won't have to follow trends.
Along with agreeing with Michael, I would like a restriction set on the thumb down choice.
If a person chooses to vote a thumbs down they must give a reason before you will post the vote.
Clarify the client challenge, I still don't get the point.
Thankfully I no longer workout in a gym
However, as an owner, I would suggest implementing certain standard across the board in order to ensure safety, professionalism, and a cohesive workout environment.
This depends on the type of training you will be offering.
What are the needs of your clientele?
What is your area of expertise?
Who is your target market?
I have seen personal training studios jammed with machines and others with a TRX, free weights and a Bosu
Writing up a business plan ...