There are no homes built on the water that I can think of. There are a few campsites with trailers and there are a few condos. You would be looking at a home right near the lake in town. For that size, I would think you would be in the $600K+ range easily!
I just bought a 1,500sq ft home, 3bd/2ba with 2 car garage and a 16'x 50' enclosed RV garage on a 21,000sq ft lot for $335K last June. The prices have gone up also. My lot alone would cost you over $200K, for the size of it and the view.