Message I got a couple days ago: “Hey Austen, I have three companies wanting to interview me in New York; I arranged them so they’re back to back, I’m just trying to scrape the funds together to buy a flight and hotel...” People that are new to tech aren’t used to comped travel
In the past, I've explicitly told the companies I had multiple interviews and asked they cover hotel for one of the days and return trip. I think my more general advice would be to be honest and ask.