The service would allow you to search for travel experts by destination or interests and schedule calls with experts to help plan your trip. How much do you think one will be willing to pay for this service?
I think that you are asking the wrong question. Any positive feedback you get on here shouldn't be used to make decisions about the idea unless it comes with money. The only feedback you should accept is that people say they see a need, which should prompt you to ask people to pay you to solve it.