A quick update: I ended up getting the Epson Artisan 1430 for $295 - thank you to those who commented on this thread for your advice. It was very easy to set up (even for a tech idiot like me) and I've produced a few prints to start. (It's extremely tempting to print everything, but I know I need to keep an eye on costs ...)
It doesn't take up as much space as I feared it would. When it's not set up to print, it takes up about 2/5 of my small desk (which is 23" deep and 42" long). The printer overhangs the desk by about 1/2 an inch on each side, which isn't a problem. And I have some open space on the right side of my desk - when the printer is open for printing the feeder extends about 8" into this space (on a diagonal). Having the printer on my desk might motivate me to keep the area tidy
The only problem I foresee is that my three cats are as fascinated with the printer (when it's operating) as they are with the shredder. So I'm either going to have to lock the cats in the bedroom when I print or I'm going to have to shred and print simultaneously, so that the cats get mesmerised by the shredder instead of the printer. I'm also thinking of getting some kind of cover for the printer, since the cats are likely to want to sit on it and in order to reduce the amount of dust and cat hair to it is exposed.
I'm also thinking about taking a weekend printing workshop at the International Center of Photography later this term, so I can learn more about the basics.