The only other thing is not to purchase resale for a vacation in the near future. Closing can take a little longer and you can't make reservations until you are in the system. Availability without even the seven month window may be poor (or you may be just fine).
And, although the advice on these boards is "buy where you want to stay" its probably more accurate to say "buy where you won't be disappointed if you end up staying there." If you dream of a OKW Grand Villa, VWL during the Holiday Season, or walking back to BWV after the Food and Wine Festival, home resort will be VERY important (and you see why people end up with multiple contracts at multiple homes). If your goal is a nice place to go to Disney every year and you visualize trying all the resorts anyway, you will likely be pleased with any of the onsite resorts.