Is there wheelchair excess to the beach at the ressiance hotel?

Yes. You could take an elevator down to "G" then go through the hall and exit the arcade. Then pass the cabana bar and take the ramp onto the beach :)

Yes

Yes there is

Yes... Actually between B building and tower.

None are easy but they exist. At the North end there is a gate that can be opened and might be easiest.

Yes. 2 or 3 access points