Ok, gonna stick my salary info in here for consideration, as I don't know what the differentials in your area are. I also live in the south, and just graduated, so this was my base pay info as a new nurse with an ADN. You'll also have to consider your shift differentials. I work weekend nights for now. That's 4 hours at $6/hr per shift, and 8 hr at $9/hr extra per shift. I also am able to work one shift a week for overtime (which I don't mind) which gives me time and a half, plus my shift diff. So, if it really comes down to getting yourself out of the hole that nursing school put you in, you can always pick up the extra shifts.
So let's take a starting salary of 22.80. If I look at a typical 3 day a week shift, you get about 12 hours at 26.80/hr, and 24 hours at 31.80/hr. That puts me at 1084/week, which adds up to a base of 56,409 yearly (assuming I always work that shift.)
Now, let's assume I work one extra night shift a week. With time and a half, that starts me out at 34.20/hr, plus my diffs. So, since there's only 3 weekend nights, let's say I get the standard 4/hr for my 12 hours. That puts me at 458.40, pre tax, just for one extra night. Even if you only picked one up every other week, that's an extra 1000ish per month, or 12,000ish per year. Or if you picked one up ever week, you'd get roughly 1900 extra per month (I'm down to estimating now, too much work to use my calculator haha.)
Now even if you don't work the weekend night shift, if you work any night shift, you'll get a few dollars extra differential. And if you don't work the night shift, typically the last 4 hours of your day shift (3p-7p) will have a few dollars extra differential, so you'll have to add that in to consideration.
Ok, all this math is making my head spin, but you get the picture. It's hard to look at the base salary for a nurse and know exactly how much you'll start out because there's a lot more to it then just that base number. Hope this helps!