Point 7: If you're printing more than 1000 pages in a year, then I reckon you're doing it wrong for most courses. If you have six essays a year at 30 pages each and you print them twice (a draft for checks then final version), that only amounts to 360 pages. Many unis have electronic hand-in these days, so you might find that halves it.
The amount you might save will depend on how much your uni charges, so do the maths for your uni before buying a printer. My current uni charges 3p a sheet for black & white printing so even 1000 pages a year would only cost £30. And producing that amount on your own printer would certainly mean buying new ink at some point, which is where the major expense of your printer will bite.
Plus a printer needs to be transported home at the end of the year which adds to the chore. The last time I tried moving an inkjet, it leaked coloured ink all over the car boot and never worked again because I couldn't clean the ink out if the internals thoroughly enough.