The great thing about National Student Exchange is that you can attend any of the participating schools for the same tuition you pay to attend WSU!
All financial aid and most scholarships apply. If you have questions about a particular scholarship, ask the awarding department or talk with the NSE coordinator.
You will enroll at WSU and pay tuition and fees here as normal. You will register in an NSE dummy course for the number of hours you plan to take on exchange. It is up to your host school how you will enroll there once you are placed. Some may have you enroll over the phone or Internet; others may have you wait until you are actually on the campus.