Atlantis Aquaventure help

We are a family of five and we will be in port until midnight. We are looking to go to Atlantis by the cheapest way possible. I looked the Comfort Inn and the price is 500$ and that only includes 4 tickets.

1. Is it possible to pay for a 5th ticket at the Comfort Inn? Is the extra ticket discounted?

2. Is there a cheaper option to buy tickets which allows people to stay on the Atlantis grounds and but not go on any rides? (2 from our party do not go on rides)

You can’t get a 5th from CS. You can buy day passes directly from Atlantis, and you can buy a beach/aquarium pass directly from Atlantis, or just an aquarium pass. Those passes will not allow access to the pool/slide areas.