I also know of American playwright Eugene O'Neill taking up residence at hotels for long periods of his life, and famously both being born and dying in a hotel room. There's also Wes Anderson's film The Grand Budapest Hotel which depicts a writer spending a long period of time at the eponymous hotel as a way to find inspiration. I'd like to note that in Grand Budapest and Eloise these hotels are (or were) very luxurious and therefore must have been more expensive.

These days I don't think I've heard of anyone, celebrity or acquaintance, that lives for long periods of their life in hotel rooms. What was the era that it was economically viable and culturally common to live permanently in hotels, especially ones as luxurious as depicted in fiction? How was this viable and why did people choose hotels over other living arrangements? Was this lifestyle only viable for celebrities and the upper class? What caused this type of lifestyle to fade away? What was this lifestyle like in comparison to renting apartments or buying houses during the same period?