I subscribe to Blee's school of thought- you don't have to be an 'angel of mercy' to be a nurse. That being said, you do, indeed, need to want a career in nursing to be able to stick with it, although there are a variety of legitimate reasons to 'want' it (read the thread on 'what exactly ARE the wrong reasons?').
Anyway, you can make $30K a year as an RN in most markets that i know of. CNA's in a lot of states don't make that much, but some states do pay them that much- comes out to something like $14.42 an hour for 40 hours a week (although most nursing and CNA positions do 3 12 hour shifts per week, which comes out to 36 hours/week).
Remember that in the tech industry, if you do something that *requires* an employee to physically be on-site - like network engineering- your job isn't going to be outsourced to india.
One thing you should think about, though, is the fact that most people think of 'working in the computer industry' as a desk-job environment, and the majority of nursing jobs
involve being on your feet most of the day- it's much more tactile. That aspect of nursing appeals to people who don't want to be chained to a desk all day, but it's not for everyone.
I would agree that you should get an idea of what nursing work is like before making your decision- personally, I'd see if you can shadow a nurse (or CNA, for that matter) for a few days at your local hospital before you even decide to pursue CNA certification (a lot of nurses work as CNA's before they become nurses). At my old hospital, it was common for high school and early college students to come in for shadow days, and people were very helpful and informative with them.
You're going to get a ton of 'you can't go into nursing for the money' responses to your post. Personally, I think the vast majority of people who have *any* job do it for the money- maybe not exclusively, but it's always a big factor. That being said, it's not the best job to have JUST to make money- you can make much more money doing other things- although, as I'm sure you know, the higher the pay, the more 'crap' you have to deal with...my husband (who just left the army) has received offers of 200K/year to go work in iraq. Yeah, it's a lot of money, but not worth it to us. Conversely, nursing generally pays fairly well for a new college grad, but you have to deal with things a lot of people don't want to do- dealing with a lot of bodily functions (yeah, nurses clean up a lot of poop, generally), standing on your feet for 12 hours a day, being treated like a servant by some families, patients, doctors....it's all about what price you're willing to pay.
I wish you the best of luck in your search.