Almost all search warrants are fishing expeditions in one way or another. If they knew for a fact that whatever the search is for is at the location, such as vi

Almost all search warrants are fishing expeditions in one way or another. If they knew for a fact that whatever the search is for is at the location, such as visual identification, then most likely probable cause would cover it. Doesn't have to be thousands of hotels, just the hotels commonly identified as popular with illegals. Once that well dries up you find a new one. Would it happen? Probably not, but would depend on the local situation.