Its one thing to think in terms of what you would say to someone if they asked you abotu training, or if people ask you a lot about training - you're still looking to get into the business of making money in a gym - that is not the same as if i were to help someone prep for a show. Some gyms require that you work thru them as opposed to you being whatever trainer and working in their gym w/ your own clients. That's usually the first thing you need to work out. The gyms like Golds, Bally's, 24 Hr, etc have their own trainers and may either not allow other trainers to train in their facilities or require you to pay a certain amount per month to train your own clients there. And then within that gym you want to train in, you might have to follow their protocol (e.g. w/ bosu balls, kettleebells, etc.) because that is what THEY are selling. These are the things you have to consider - you are putting yourself into the position of Selling Training Product as opposed to sharing your expansive experience w/ others for money.
These are the things to consider - you are now in the industry of SELLING and not trainign.