So I’m going to try really hard to make sense. 
After a lot of thinking and planning, we have decided to purchase DVC. We plan to go on one big trip to WDW with our teenagers and adult children every other year (with many small trips in between...4 of us have APs).
But here’s the catch: my husband does not want to finance, so he wants to wait until January to purchase when we have the money to pay for it outright. My concern is that we have a trip for March 2020 (3 months after he wants to purchase). Will we even be able to get a reservation that late for a family of 7? We will need a 3BR for the week of March 7-14.
Thoughts?

After a lot of thinking and planning, we have decided to purchase DVC. We plan to go on one big trip to WDW with our teenagers and adult children every other year (with many small trips in between...4 of us have APs).
But here’s the catch: my husband does not want to finance, so he wants to wait until January to purchase when we have the money to pay for it outright. My concern is that we have a trip for March 2020 (3 months after he wants to purchase). Will we even be able to get a reservation that late for a family of 7? We will need a 3BR for the week of March 7-14.
Thoughts?