Honestly, no up-front renovation is really even required, is it? They could pre-sell the existing rooms such that the new owners take possession on Feb 1, 2042, rent the unsold rooms that they own, and take blocks of their own rooms out of service a few at a time so they can renovate without closing the resort. As a buyer I'd want to know that the developer will eventually pay for renovations so it's not hitting the HOA's reserves after I've already paid a premium to acquire the new resort, but I don't think I'd care a ton about timeline.