I follow a low carb, moderate protein, moderate fat Paleo diet and believe in a less is more approach to fitness. I encourage short duration, high intensity training to my clients.
2 years ago I would hop on my eliptical machine at 5 am every day for 45 minutes of hard intervals, have a shake, walk my dogs for 40 minutes, shower and eat, go to yoga class, come home eat and sleep, wake up and eat again then go weight train for 60-90 minutes, eat again, walk my dogs again for 40 minutes, shower, eat dinner and then suffer through massive carb cravings from my chronic cardio and over 3 hours of training every day.
These days I weight lift about 4 days a week for 45 minutes or so and try to get in at least 60 minutes of low intensity walking every day. I still do try to get to yoga class at least once a week. But, I'm getting the same results following this program with my paleo diet as I was 2 years ago when I was literally training all day every day eating a standard American diet. Diet determines 80% of body composition. Now that I am on the paleo diet and not doing excessive cardio, I no longer have the cravings for sugar and other processed crap food.
I generally do not ask for payment upfront. Trust is very important in an escort/client relationship. Without trust, neither party will feel at ease, making it impossible to truely relax and enjoy the experience.