Budget trip?

I have been thinking about my favorite place to go. In my mind, I am plan to find the best rate specially for Outer Banks vacation rental. I really like the package that they have provided.

But I have a problem that might stop me to do it. I don't know how to tell you guys but I don't have a big budget for my next trip. I really want to spend at least 1 week there. The current budget that I have right now will entitled me to spend only for 2 nights.

Do you have any idea on how to solve this problem?