[Tigerbangs]

Signals are only moderate in your area, and it will be very hard to get all of the major networks by aiming a single antenna inside your attic without a rotator. The Wilmington stations would be a possibility except that WILM-LD is the CBS station for that area, and is too weak for you to get with an indoor or attic-mounted antenna. Myrtle Beach's CBS station is on VHF Channel 13. A DB4E probably doesn't have enough VHF gain, even with it's VHF add-on elements to get channel 13 reliably.

I would first assess how much room there is in your attic to see whether you can rotate a fringe VHF-High-Band + UHF antenna, like a Stellar Labs 30-2475 VHF Yagi plus a 30-2370 deep-fringe UHF antenna plus an RCA Antenna Preamplifier, which has separate VHF and UHF inputs, which makes connecting the two antennas very easy. As for a rotator, look at the Channel Master 9521, which is fully automatic, and has a remote control and presets to facilitate easy channel recall.

If you can't easily rotate that combo in your attic, expect that you may have to be the first in your neighborhood to mount an antenna on the roof.