Ok so this might seem like the cheap or easy way out, but several times I have taken out porn stars who were on their way down in the biz, who had amounted to second rate OF girls, and you can get them for normal escort rates. I waited out a few who I liked ten years ago then accidentally discovered them on OF, chatted them up, and dot dot dot creampie.
My wife and I are friends with a short list of third rate porn stars, maybe best categorized as fetische or niche porn stars. They self-produce for the most part, so they aren't calculating their escort rate against a 5-20k daily rate on set. Some of the fetische actresses who self-produce may make at most grand over the lifetime of a production, so an hour of escorting for them can easily be cheaper than this: less work for much much more dollars per hour.
If you need the hottest most popular current girl though, as others said, it's a rich man's game, more likely 1-5k an hour, you'll want at least two hours for the experience, and most will be FMTY and will require a hotel room, and they don't stay at a Holiday Inn Express.