I work in a public aquarium (Atlantis Marine World), so between our 20,000-gal reef tank, 80,000-gal snorkel tank, and 120,000-gal shark tank, we have space for a few angels. We just started getting lionfish this week too.
As for doubling the size our turnout, I don't know that we necessarily want to do that (especially considering how parking and beach access can be in the Hamptons), but you should be able to get a lot of the same species in Eastern CT and RI. If your club is interested, I have a presentation on collecting tropicals outside of the tropics.