You have actually answered your own question: depends on the school and on your interaction with the admissions team. Some schools will be appalled that you would apply without visiting the campus in person, others will find it unimpressive, since most students do so and some will be completely indifferent. I always tell clients to visit if they possibly can. Know why? It can't hurt. Noboby has ever been dinged for visiting, and there is no better way to try a school on for size than to see it up close and personal. Having said all that, I don't know of any schools who would dismiss an application solely based on no visit, so I don't think there is any real risk in not visiting if you can't pull it off. But you would certainly feel better about applying there if you were to visit.