You can have some fun with this question, helping the interviewer to understand how creative you can get when planning an epic getaway for a client. Let's say there is an unlimited budget. Where would you start? With a high-end vacation, you need to make sure that you account for every small detail. Keep your reply on track, but play around a bit with your response.
"I keep a list of the Top 10 luxury beach resorts in the world, and cannot wait to take a vacation of the sort myself, someday. If a client had an unlimited budget, my go-to recommendation would be Constance Moofushi, in the Maldives. It's a small private island where you can have your own personal 'hut' on the water. The area boasts some of the best scuba diving experiences money can buy, as well as many on-site luxury services such as a spa, private tours, and premium food and beverage experiences."
"An absolute dream vacation, where a traveler could spend an unlimited amount of money, would be Xaranna Okavango Delta Camp located in Botswana. It is a luxury safari lodge where guests can enjoy tented suites with large soaking tubs, a private pool, and cushy cabana areas. You can see wildlife such as lions, leopards, hippos, and elephants. There is a private chef on site also. For those who enjoy ultra-remote vacation experiences, it's a must-go."