I respectfully disagree with BrickG... the schools in Pawleys are listed as among the best in the state although the Georgetown school district has schools on the other side of the county that bring the district down. I know the principal of the new intermediate school and expect it to be run very well and will alleviate the crowding in the current schools. The Saint James schools in Horry County are good as well but I think Waccamaw is rated better.
There are several neighborhoods in Pawleys that you could buy a house that size for under $500k and they are all nice. However, if you are interested in a real family neighborhood your options become more limited.
I would recommend
Ricefields or
Pawleys Retreat, there are a ton of kids in these to communities that are right next to each other. They are central to the schools, too. Homeowners fees are pretty low... Pawleys Retreat is less than $300 for the year (no pool though). Ricefields is a bit more but they have a pool and the grounds are beautiful.
The Reserve (http://www.thelitchfieldcompany.com/communities.cfm?commid=15 - broken link) &
Pawleys Plantation are two very nice gated golf communities but there are less kids around. There are several other nice communities too.
We have a 3800 sq ft home (5 b/r) on just under a half acre along a small lake.... taxes are $1080. Electric averages about $120 a month and homeowners is $3000 a year.
I can send you a PM with some real estate search engines if you are interested.