The pay for NA's sucks. If you have to eat and pay rent solely on the money you make as an NA, either go on a crash diet and live in some old lady's garage or find a new job. I'm an NA now, but fortunately I have a wife that makes a good bit more than me. Together, we manage to feed ourselves and our dog. Beyond that, we live quite humbly. That said, the experience you will get as an NA will make you a much better doctor. I work on a neuro/med-surg unit, and most of the doctors I see really pee on the nurses. They are so cold all the time, it is as if they don't realize that they talk to these hard-working young ladies every day. I will never be that way now that I've seen the other side. Sure, time constraints and pressure are gonna be an issue, but I'd rather leave the hospital fifteen minutes later so that I can talk to each of my co-workers in a respectful, concerned manner.
(Steps down from his soapbox)
NA work is great. You'll learn to be a million times more sympathetic to patient needs and expectations. You'll feel the satisfaction of tending to someone's most basic needs when they can't do for themselves. If you can work past money issues, you should do it. I took the NA certification class through a community college at the hospital I work at. It took two months, going to class two or three times a week for six hours per day.