Skully,
Just an observation....
When I first went to AC, I immediately noticed the lack of accessibility there. (My son was in a wheelchair, so I am very aware of these things). That is one thing I would love to see addressed. (Now that we have a property there, our own property is not accessible, so I know I need to start "at home").
This was also very evident when on my last trip down, I fell and dislocated my ankle. What I will tell you, is that while I can't help you with accomodation information, I will tell you that the people of AC will go out of their way to help you. This starts at the airport in BC, Maya Airline (I can't say enough good stuff about these guys), to the restaurants, to the divemasters, to the people on the streets..... simply amazing!!
So pack your stuff, and get on a plane! Enjoy your trip, and let you wife revisit Paradise!