I have an Ipad with a keyboard. All of my nursing books came in electronic form, so I was able to load all of them onto my ipad... LOVED that I never had to carry around all of those books. I am fortunate enough to have a laptop as well. I used my laptop much more than my Ipad. Keep in mind that there are programs that cannot be used on a tablet.. such as microsoft word and flash player.
If you can find an inexpensive tablet it will come in handy in addition to a laptop, but I would not recommend using a tablet only.