1,324 hours was 'company`. Since she seems to be the sort of escort who is taken out to meals and flown to destinations we can assume she is high-end. Her gross income could be over half a million a year, but with a lot of expenses.
I have a friend who has a partner who has a sister who went into the biz. She`s stunning, intelligent and charming and charges 200 quid an hour for her time (with discounts for long encounters). Her family were a bit freaked out at first but have accepted it. By the time she was 25 she had a list of about 20 well-heeled regulars who were perfectly happy to pay for her time of which maybe 10% was `on the D`.
When not working she enjoys buying investment properties for cash and taking frequent long-haul holidays (sometimes busman`s holidays) and expects to retire comfortably by the time she is 30.
Most sex-workers are in a desperate state, but a small number make it work for them. Good luck to them.