Ok so you've found the best place for the money and now you just have to wait...ah waiting to go is the worst part! In the meanwhile start planning. Make sure that you have all of the necesseties such as clothes, beachwear, sunscreen, etc. because yes, there is Walmart there, but you will still pay higher prices at the beach.
Plan on taking whatever you can, if you can take your laundry detergent/dish liquid/cleaners---take them. If you've decided on a condo, they usually come fully equipted with a kitchen. Yes, we do eat out, but for lunches on the beach, snacks, and even an occassional dinner you will need to plan accordingly.
Take a cooler for the beach (and for the seafood you may pick up...we'll talk about that another day) Beach chair, sunscreen, a camera (and film if you have a regular camera), batteries, toiletries, sand toys, swimwear, etc. That's all more expensive at the beach. If you plan ahead, you can watch for the deals where you live and have it all ready for when you leave.