Adding ports to your room
I'd recommend getting a small ethernet switch - don't bother with a router. To maintain speed, you;d need to get one that's gigabit capable (usually marketed as 10/100/1000 Mb). You should be able to get a decent four or five port gigabit switch for under $30, and I think I've seen some on sale for under $20 lately.
In terms of the wireless, it's going to be interesting. We actually have pretty sophisticated access points - one of the few brands that's any good at limiting interference and optimizing the signal. We made some configuration changes over the summer, and now we have to survey during peak usage times. We're going to focus on a couple of buildings in detail, get the best picture of what's going on that we can, and see if we can apply what we've learned to the other buildings.