How do you know you're going to be her first ever client? I would agree with you she's trying to earn maximum income and she wouldn't be the first person to ad lib to up the price. Starting at £250/hr, asking for a deposit.... Is the 4 hour meeting your choice or hers? You don't know if she's fit and have no idea if she's any good in the sack. If she's genuinely new to this, how do you (or her for that matter) know she's got what it takes to see out a 4 hour booking with a stranger? It could be the best four hours of your life with a hottie but, equally, it could be an hour with someone you don't find attractive who starts making all sorts of excuses to leave early with your £600. If you're set on giving it a whirl, perhaps you could at least ask for some decent photos from her. Good luck!
She responded to a reverse booking I placed. Not offering exactly what I was looking for, but intriguing. Brand new AW profile with a couple of fuzzy photos. Met for a chat whilst I was passing on business and discussed what I was looking for and what her drivers for trying escorting are (money obviously but she wants some life experiences).
She's legit and has never escorted before, IMO. Too naive for one thing, whatsapped me from her real life phone so pointed out she shouldn't do that. Thought deposits were normal, well perhaps if you've been perusing "high class courtesans" websites, but all those girls started on AW selling themselves for £130/hr (I know because I've fucked one or two of them, always bitter sweet when you contact for a rematch and have to say "how much? Fuck off!"). Also pointed out if I bank transfer a deposit (which is what she wanted) she'd had to give me her real name and she'd have my real name, not very discreet for either of us. And yeah, I never pay deposits to hookers for all the very obvious reasons, red line for me.
I'm in 2 minds TBH, like you say could be epic or could be a damp squib. No rush, plenty of time to ponder!