This topic has been discussed a few times over the years, but not so recently.
It is VERY risky and not worth the gamble to spend a week with a lady you don't know well, or at all. See her a few times, do an overnight, maybe a weekend even first, to see how you travel together.
Do the math here too. She wants 10K. The week at a 4 or 5 star place runs 5K each. More if she wants a separate room and some ladies demand this, especially if they don't know you. You can spend a lot of money with no guarantee at all that there is any chemistry.
There are way too many stories of guys taking a lady to an all inclusive or something, sharing a room, and there's a falling out. She leaves, or he does, spending thousands to get home, or worse, a review from years ago had the lady leave the guy and hook up with someone else at the resort and he only saw her again on the plane ride home.
Published rates are around what Harmony stated, but some are even higher. Many ladies who actually like spending time with you may actually travel for less because they want a vacation too, but would never admit to that because too many other guys who they don't like as much would try to take advantage. They may only ask for an hour session paid time each day in one example I know of from another board.
It's highly individual and highly variable. But please for your own sanity and safety, don't try to book a week in a foreign country with someone you have never met.