How often you work with your Personal Trainer depends on your budget and motivation. Your can see a Personal Trainer once a week to be put through your paces, or to correct technique if you're motivated to do the home work you're given by your Personal Trainer.
Some people like to work with their Personal Trainer twice a week due to the massive benefits you can gain.
Sessions are charged by the hour and prices depend on how often you want to train, and where you want to train.
Everyone's circumstances are different. You need to sit down with a Personal Trainer and tell them what you want and then you decide together what will work best for you.
Don't assume you can't afford the benefits of your own Personal Trainer. We have options to suit everyone.