There is a secondary issue here as well. In order to book, the building that you buy into has to be open.
Word has it that SSR has sold out the first three buildings and is working on the 4th.
Building 1 opens in May, 2 in June, 3 in July and 4 in August.
The next building doesn't open until sometime next year.
If building 4 should sell out and building 5 was being sold at the time of your purchase, I believe that you would not be able to make reservations for the dates indicated.