I'm tired of this heat! I live close to the beach, but our bedroom is upstairs and it's hard to get to sleep. How do those portable jobbers work? I'm not talking about a window unit but one that rolls on caster wheels. Are they worth the $3-400? Do they still need a window for intake? The problem is our windows are a good distance away from the bed. And they are not the slider types, they are the kind that swing open vertically like a book. Can you get one of these to work with that kind of window? Thanks for the help. My wife will appreciate it and I might get some.