Hello ya'll,
I've found there are basically two places to rent beach properties weekly at Wrightsville Beach: Intracoastal Realty and Bryant Real Estate. I know from Bryant there are still affordable options but you need to book ASAP (Wefest is 48 days away!). Their websites are:
http://www.intracoastalrentals.com/
http://www.bryantre.com/book/query.html
After viewing some options and looking at photos online you should call to book over the phone so you can rent from Thursday to Thursday - I'm not certain the web allows that option and the agents seem willing to work with you. Let me know if I can help.
See you soon!
Lee Buffaloe