You'll be surprised what 1 room mic can do in even a small room, it helps a bunch. Compress the heck out of it with a Fairchild 660 plug if you got it or experiment with that, the drums will come alive even in a tiny space. My space is smaller than yours and it work great for me. It would be best to record it with a large condenser but if you only have the 2 603's that's fine, use whatever else you got.
The mic setups you have seen fine, I don't think there's any reason to mic the beater side of the kick though.
You could always see if you really need the snare bottom and if not, use 2 mics for the room for a decent stereo image. Have fun and just try different things.
Here's a track where everything was done in my small-ish room, not really sure if I used a room or not, but it sounds like it:
http://aermotorstudio.com/The-Parson...l-As-Usual.mp3