There are definitely clients out there who like to pay several hundreds (or thousands) to spend hours and hours with a girl, but as Alba said, there aren't really enough of them to run an entire business on. If you only need pocket money then sure, charge ?500+ for multi-hour appointments - but don't be surprised if you only get two a week - or a month!

It does all really depend on multiple factors though; your location, your advertising, the precise numbers, etc. We can't tell you all the answers in advance, so you might need to do your own research in this area.
I know that I for one put my rates at a little above average (?150 can be considered a sort of mid-level point, I think?) so that I wouldn't have to deal with quite so many bookings each week - I wanted to be part-time to allow for my studies. If I wanted 10+ bookings per week, I'd definitely need to reduce my rates! But am grateful to be able to get by on half as many, cos even after tax I earn more than most students do so I'm very lucky.
I think setting rates and targets and stuff is all about mindset. How many bookings would you enjoy doing per week or per month? Would you like to incorporate touring? Is this going to be your sole income? Exactly how much do you
need to earn to cover your expenses? Or are you saving up for something specific over, say, a 3-6 month period?
"High-class" really doesn't mean anything, unfortunately. Sure... if you don't ever wash and just offer incalls from the back of dilapidated old car then maybe you're not a "courtesan" but the vast majority of us as you'll see from this forum are smart, safe, professional and good at our jobs. We don't need to stick klassy labels on ourselves to prove anything; most clients know that when they come across a well-written profile with ideally some good feedback linked to it, they're in for a great time.
