Switch:
You are probably looking for this kit (for tanks,vehicles and infantry):
http://www.internethobbies.com/internethobbies/tr1wwusnalcm.html
or this (for infantry only)
http://modelingmadness.com/reviews/misc/hohenzylca.htm
In addition to that you might need to spend a few dollars on figures, paints and other materials for the trees and other stuff you might want to add on the beach like barbed wires, etc..
I am not familiar with prices in your area but I guess it would be under US$100.00
Good luck.