yes, my bands pay 460 a month for a rehearsal room. yes, that's a fuckload of money, but good thing we have 3 bands in the same space so it's not so bad. i keep hearing about better deals though, but it would be such a pain in the ass to move anywhere else, plus we need to be able to practice in our city.
those complexes with several rehearsal spaces usually are equipped with security cameras, but don't rely on those. i sure know security cameras didn't stop a bunch of junkie lowlifes breaking into our rehearsal space and stealing an xbox 360, controllers and games (we were extremely lucky they only took those). make sure you have a good insurance - as far as i understand, if you have a home insurance it will also apply to certain types of outside-home storages like a band rehearsal space.
our space is located in an industrial district so we don't really need to worry about the time, but on the other hand it makes the complex a bit more vulnerable to all kinds of thief fucktards.