day,
You might check the websites for some of the big auctioneers in your area.
I frequently see "beat up" pontoon boats for sale at cheap prices. I wouldn't take them out on a large windy reservoir with my family. However, you could strip the deck down to just your needs, and certainly be safe on a small pond.
You could also salvage the pontoons and make your own top deck.
Question to add to thread:
Is it feasible to repair aluminum? For example, aluminum pontoons with a puncture or an aluminum jon boat?
