[ghaff]

100 is probably a big number. Consider that would only get you their services for about 30 minutes/week on average. They're also not going to know you and your preferences very well at that point or be immediately on call.

That's certainly far more than an admin at a company covers for anything beyond very cursory attention.

Travel agents can still help you a fair bit within their area of expertise. My experience is that for a very long time, most largely just booked flights, hotels, and cruises before the days of self-service. However, there are specialty companies that can help handle a lot of details for certain types of trips.

There are also companies that offer virtual assistants but, going by past experiences with not so good admins, I'm a bit skeptical how much value you'd get in general.