Suggestion: get a bigger window unit. Around here, $650/mo would be a real bargain for rent, even on a studio. Why suffer? You can always bring the window A/C with you when you split the tenement, right?
I'm relatively lucky, I guess. Around here the temps are generally pretty mild. Maybe for 2-3 weeks each summer it can get into the 90's and even the low 100's. For that I recently purchased a couple of 5300 BTU Daewoo's, and they'll be running this summer. Normally I just run fans blowing in cool night air all night during warmer weather, and then button up the house before I go to work. But on weekends that doesn't work as well, and sometimes it just gets too darn stuffy. And during those 2-3 weeks the nights can be warm, too, with off-shore breezes, so the fan technique doesn't work at all. I figure I can retreat to the bedroom to cool off during the worst of it - the other A/C will be in my family room/office where I spend most of my waking hours inside the house anyway.
A bigger window A/C unit surely would be cheaper than staying in a hotel, right?