They were doing 1 regular hotel floor every ~1.5 calendar weeks. It looks like mechanical floors will take ~ 4 weeks. Considering the inevitable winter slowdown due to weather I would venture to say that by this time next year they will be working on the 40-50 floors.
You guys will probably enjoy what we have been able to do with the recent drone video that was posted a couple pages back, speeding it up and providing a detailed description of what you're seeing as the drone drops down in the ACS. Read about it on the front page here.