She does look good, but for me reading her AW profile, it seems too well scripted and you'll be heading into unknown territories and at £2000 I wouldn't take the risk. She's only been a member less than a week, I'd hazard a guess she does not look 18 as claimed.
Looking at her 1 positive feedback, the guy who left it for her has a string a feedback he has left for girls, all with a rating of 0, 1 or no longer members, so at the very least that would set my alarm bells ringing.
There is a very well reviewed girl here who offered me a discounted overnight rate at £650 which she said could be a relaxed overnight upto 16 hours with some sleep included of course. Her normal price I think is £900 and is for 10 hours.
I think £2000 is too high, but we all have different budgets so not my place to say. Its not like you are going to be having sex all night so if she usually charges say £150 or even £200 an hour, an overnight should be significantly less at an hourly rate.