To kind of cancel out my smartass reply, I'll give you a serious answer (for a change):
I'd say the EE ladies work 6 - 7 days a week and probably see 3 - 4 clients per day but I have heard that it can be as many as 7 or 8 single bookings. IMHO that is just TOO much.
Anyhow, more importantly: how busy do YOU want to be? Providing a quality encounter comes with a price, therefore one could charge more per encounter. If one wanted to be busier, then a reduced rate/less quality encounter(s) could increase the amount of customers you'd see, plus increase your income.
Being self employed I don't want to be as busy as I am sometimes. I just wish business wouldn't come in waves. At times I have to double my prices to try and dissuade some business (and I get screwed when they accept it lol) and there are times I'm scrounging for even the smallest project. You see I got into my biz because I loved doing it as a hobby and do enjoy doing it for a living. However, often I am so pressed for time I have to rush and don't enjoy it. I guess you could equate this to the sp biz as well.