Secondly, being a nurse is a HARD job. It's a blue collar job, and it should be (probably was) on Mike Rowe's Dirty Jobs. It's back breaking labor, stressful, and debilitating. Most of my family work in health care, and so far, my cousin has three herniated discs from lifting obese patients over the years, my wife had several blood tests done from being exposed to Hep C patients, and I've known several nurses who have suffered extreme burn out.
Being a PA is marginally better, I suppose, but you're dealing with the same garbage.
There are some definite pros about becoming a nurse over a doctor for sure. But, if you plan on staying on working the floor, become a doctor if you're smart enough. It's still in nearly every regard better than being a nurse on the floor. However, if you have more ambition, you can try to move up the ladder in management and administration as a nurse.
Finally, there are lots of other oppty's for nursing besides beside nursing. If one gets burnt out on patient care, one could move into case management, school nursing, teaching, etc...