Based on some things I have read and also from people who were actually at Royal Palm, most of the damage is to the interior. While the outside of the building appears to be pretty sturdy and has withstood numerous hurricanes in the past, the interior did not fare as well. One engineering theory was the sliding glass windows, while heavy and strong, many gave way during Irma and this lead to substantial interior damage. Considering all rooms face the water, add the extreme wind and rain and you have a recipe for disaster if the sliding windows gave way.
Yeah, the basic structure at RP is poured concrete. I doubt it was significantly affected, but the interiors could be more or less gutted. And the timing is almost certainly going to be affected by two important considerations (actually three) that go beyond simply how much work there is, and how long would it take to perform it. One, availability of materials. Two, availability of skilled labor. Three, $$$.
Our friends have been staying at Royal Palm since they arrived back on Oct. 10th, they own year round and their unit had no damage to speak of. As for Diamond, they may want fixed week owners to just walk away so they have more units for the points people. A big assessment will make that happen. I checked into their Xchange program and found that there are no vacancies in any of the warm places during prime time.