I stayed at the Kay, I think. Hard to tell by google pics and the diner pics nearby. Armed security, and a nice turn around for taxis. Super close to action, so your knees should be OK, and they had an elevator IIRC.
PDC is a ton of walking though. Nice fun hike to the ferry. Put on head phones if you want the street urchins to clam up.
Across the street to the left of it was La Terraya a beachfront lunch diner that was great.
Great place to eat while watching divers tumble in the surf, trip over the stern rope, while dive masters try thier hardest to chum themselves against a spinning prop out of the water. Dip stick scuba doesn't have their own pier, they just back the boat up to the beach with the outboard motors half way up. Hilarious. People looked like they had a good time, but seemed like an example of how a dive op shouldn't be.