I just responded to your other post, it seems we have had the same questions. I did put my BCV purchase on my chedit card exactly for the purpose of FF miles. I check in with the Timeshare Store about doing this with a resale, and they said that it was not an option.
With Disney all you have to do is put down a deposit and it does not start collecting interest until June when you close. So I will just put the rest on my card then, after I would have taken my 7 night deluxe vacation that was included with my purchase.
Belle and Rella's Dad
with another one on the way I will have to change my moniker